Anesthesia Implications of Syndromes and Unusual Disorders 1

Total Page:16

File Type:pdf, Size:1020Kb

Anesthesia Implications of Syndromes and Unusual Disorders 1 APPENDIX A Anesthesia Implications of Syndromes and Unusual Disorders 1 This Appendix contains brief descriptions of common and rare syndromes; their associated anesthetic considerations for safe pediatric anesthesia practice are outlined. Many of these shared features make precise identifi cation diffi cult; the reader should consider all the information provided for informing anes- thetic considerations. Whenever possible , the referenced literature should be con- sulted before anesthesia is undertaken. A brief list of several excellent resources that are up-to-date follows this introduction. In some rare syndromes, the only references are in foreign language journals; we have listed these when an English abstract was appended. Very occasionally, the reference refers to the disease in adults; we still include it when no published pediatric literature was available and where we thought that the adult information provided might be useful. Space limits a complete literature review for each condition, but we have attempted to list the most important and recent publications or case reports. There are now more than 10,000 medical syndromes recorded, so it is inevi- table that this list is incomplete. Although the number of syndromes has increased and existing syndromes have become better understood in part because of genetic studies, anesthesiologists may still encounter unreported dif- fi culties and complications. When in doubt as to the identity and implications of a particular syndrome, the anesthesiologist should make preparations that take into account all possible associated disorders. Recurring challenges that are common in many of these syndromes infl uence the choice of an anesthetic technique, specifi cally the diffi cult airway and con- genital heart defects. The reader is encouraged to consult the chapters that pro- vide approaches to management of the diffi cult airway and specifi c congenital heart defects, which may be adapted to the particular syndrome presented and in accordance with the practice and experience of the anesthesiologist. Those conditions that include impaired renal function require special care when administering radiologic contrast media. Classic descriptions of the clinical 1 Originally adapted from Jones EP, Pelton DA: Can Anaesth Soc J 23:207, 1976 and exten- sively augmented and revised. © Springer International Publishing Switzerland 2016 523 J. Lerman et al., Manual of Pediatric Anesthesia, DOI 10.1007/978-3-319-30684-1 524 Appendix A: Anesthesia Implications of Syndromes… problems of a syndrome may allow the reader to decide when newer drugs and techniques can be used safely in individual cases. References Kliegman RM, editor. Nelson textbook of pediatrics. 19th ed. Philadelphia: Elsevier- Saunders; 2011. http://www.nelsonpediatrics.com . Baum VC, O’Flaherty JE, editors. Anesthesia for genetic, metabolic, & dysmorphic syn- dromes of childhood. 2nd ed. Philadelphia: Lippincott, Williams & Wilkins; 2007. Bissonnette B, Luginbuehl I, Marciniak B, et al., editors. Syndromes: rapid recognition and perioperative implications. New York: McGraw-Hill Medical Publishing Division; 2006. Fleisher LA, editor. Anesthesia and uncommon diseases. 5th ed. Philadelphia: Elsevier- Saunders; 2005. Jones KL, Jones MC, Del Campo Casanelles M, editors. Smith’s recognizable patterns of human malformation. 7th ed. Philadelphia: Elsevier; 2013. Appendix A: Anesthesia Implications of Syndromes… 525 Table continues on the following page. continues on the following Table cation: A case report. J Anesth. Anesth. J A case report. cation: cult but usually is not. Tracheal Tracheal cult but usually is not. lish abstract]. Anaesthesist. Anaesthesist. lish abstract]. cult due to excess lax skin. High incidence of High incidence lax skin. excess cult due to Preoperatively check electrolytes and ensure that electrolytes and ensure check Preoperatively even administered supplementary are corticosteroids for surgeryif by (i.e., anesthesia is unaccompanied MRI or other investigations) Intubation may be diffi may Intubation and depth oftube size insertion best judged by are a smaller tube than weight (not age)—most require Caution with neck their age. by indicated is IV access extension. excessive movements—avoid diffi on in the sitting position when operated complications Anesthesia implications Caution with muscle relaxants and residual weakness. weakness. Caution with and residual relaxants muscle other special recommendations No cation broblastic broblastic uid (CSF) shunts sm. Defective fi Defective sm. child with Aicardi syndrome undergoing laparoscopic Nissen’s fundopli Nissen’s undergoing laparoscopic syndrome Aicardi withchild n therapy in congenital adrenogenital syndrome with salt loss. [German-Eng with syndrome salt loss. adrenogenital n therapy in congenital Most common form of common Most dwarfi syndrome and Saethre-Chotzen See Carpenter syndrome See Apert syndrome virilization of hydrocortisone; synthesize Inability to supplementation, steroid All need perioperative females. ifeven not salt losing See leukodystrophy growth factor 3 (FGFR3) at chromosome 4. Defective bone Defective 4. 3 (FGFR3) at chromosome growth factor formation with rate of decreased endochondral ossifi leads to shorter tubular bones. Foramen magnum or spinal Foramen shorter tubular bones. leads to brain to be related Sleep apnea may occur. may stenosis craniectomy, need suboccipital May compression. stem fl or cerebrospinal laminectomy, Description spasms. Marked myotonia and drowsiness. Repeated Repeated and drowsiness. myotonia Marked spasms. aspiration pneumonia and infantile chorioretinopathy, callosum, corpus Absent 2011;25:123–6 Name Achondroplasia 2003;13(6):547–9 Anaesth. Paediatr management ofAnaesthetic a patient with achondroplasia. G. Korula N, Eipe BS, Krishnan Acrocephalopolysyndactyly Acrocephalosyndactyly Adrenogenital syndrome substitutio Perioperative W. Petrykowski von M, Abel Adrenoleukodystrophy syndrome Aicardi 2007;17(12):1223 Anaesth. Paediatr syndrome. Aicardi with in a child Anesthesia J. Mayhew management ofAnesthetic a Y. Mizuno T, Miwa Y, Terakawa 1984;33(8):374–6 526 Appendix A: Anesthesia Implications of Syndromes… level ++ cult ow (HBF); (HBF); ow ciency) and vitamin K level le, diffi cult airway; have oxide (pneumocephalus) (pneumocephalus) oxide e Reports. 2012;pii: bcr2012006901. bcr2012006901. 2012;pii: e Reports. urane has least effect on HBF. Maintain Maintain urane has least effect on HBF. uid therapy uid Ensure that anti-seizure medications will be given the medications will that anti-seizure be given Ensure Check hemoglobin and Ca morning of surgery. Assess cardiac status (echocardiogram) preoperatively. status (echocardiogram) preoperatively. cardiac Assess profi coagulation Bilirubin, preoperatively. should be checked a regurgitation; encourages Hepatosplenomegaly be necessary prevent to induction may rapid sequence Caution with drugs the liver. aspiration. handled by drugs hepatic blood fl that decrease Avoid isofl Epidural HBF. preserve to volume intravascular but check opioids, over be preferred anesthesia may X-rays). (check anatomy and vertebral clotting state Caution with transport osteoporosis and positioning; (vitamin be present D defi may Check and correct electrolytes to normal values. Renal Renal normal values. electrolytes to Check and correct drugs and caution with excreted impairment; renally fl airway cart at hand. Nasal airway unreliable; may may unreliable; airway Nasal cartairway at hand. and airways prepare obstruct when anesthetized; mobility Limited N.B. laryngeal (LMA). mask airway nitrous Avoid of joints. preoperatively. Care in moving, positioning, and use positioning, in moving, Care preoperatively. diffi of Beware restraints. Anesthesia implications supplementation + eumocephalus may occur. occur. may eumocephalus Disorder of osteoclasts and bone overgrowth. Infantile Infantile ofDisorder and bone overgrowth. osteoclasts ofmalignant at less than 1 year form presents age with because of and seizures thrive hypocalcemia. to failure and obligate bossing, frontal macrocephaly, Lethargy, nasopharyngeal (overgrowth bone) are mouth breathing and pn Hydrocephalus common. marrow from Anemia pathologic fractures. Brittle bones, hepatosplenomegaly sclerosis; with alkali and K Treated calculi. renal (97 %), musculoskeletal (inc. vertebral), ocular, facial, and facial, ocular, vertebral), (inc. musculoskeletal %), (97 of presentation an Variable abnormalities. neurologic cases Severe dominant inherited condition. autosomal transplantation liver necessitate Description rickets, osteomalacia, hypokalemia, tubular acidosis, Renal cardiac have of May Disorder the bile ducts with cholestasis. 10.1136/bcr-2012-006901 10.1136/bcr-2012-006901 Marshall L, Mayhew JF. Anesthesia for a child with Alagille syndrome. Paediatr Anaesth. 2005;15:256–7 Anaesth. Paediatr Alagille with for a child syndrome. Anesthesia JF. Mayhew L, Marshall disease Albers-Schönberg (marble bone disease; osteopetrosis) ofAdministration BMJ Cas a paediatric general anaesthesia to patient with et al. osteopetrosis. I, Demirel Erhan OL, AB, Ozer doi: Albright-Butler syndrome 2001;94(5):221–5 Soc Med. J Royal tubular acidoses. The renal Capasso G. RJ, Unwin Name Alagille syndrome Appendix A: Anesthesia Implications of Syndromes… 527 culty—but usually culty—but Table continues on the following page. continues on the following Table a. 2006;61(4):394–8 a. ure. Am J Med Gen. 1997;69(1):13–6 Gen. J Med Am ure. syndrome: case report. Sao Paulo Med
Recommended publications
  • Hyperammonemia in Review: Pathophysiology, Diagnosis, and Treatment
    Pediatr Nephrol DOI 10.1007/s00467-011-1838-5 EDUCATIONAL REVIEW Hyperammonemia in review: pathophysiology, diagnosis, and treatment Ari Auron & Patrick D. Brophy Received: 23 September 2010 /Revised: 9 January 2011 /Accepted: 12 January 2011 # IPNA 2011 Abstract Ammonia is an important source of nitrogen and is the breakdown and catabolism of dietary and bodily proteins, required for amino acid synthesis. It is also necessary for respectively. In healthy individuals, amino acids that are not normal acid-base balance. When present in high concentra- needed for protein synthesis are metabolized in various tions, ammonia is toxic. Endogenous ammonia intoxication chemical pathways, with the rest of the nitrogen waste being can occur when there is impaired capacity of the body to converted to urea. Ammonia is important for normal animal excrete nitrogenous waste, as seen with congenital enzymatic acid-base balance. During exercise, ammonia is produced in deficiencies. A variety of environmental causes and medica- skeletal muscle from deamination of adenosine monophos- tions may also lead to ammonia toxicity. Hyperammonemia phate and amino acid catabolism. In the brain, the latter refers to a clinical condition associated with elevated processes plus the activity of glutamate dehydrogenase ammonia levels manifested by a variety of symptoms and mediate ammonia production. After formation of ammonium signs, including significant central nervous system (CNS) from glutamine, α-ketoglutarate, a byproduct, may be abnormalities. Appropriate and timely management requires a degraded to produce two molecules of bicarbonate, which solid understanding of the fundamental pathophysiology, are then available to buffer acids produced by dietary sources. differential diagnosis, and treatment approaches available.
    [Show full text]
  • Effect of Propionic Acid on Fatty Acid Oxidation and U Reagenesis
    Pediat. Res. 10: 683- 686 (1976) Fatty degeneration propionic acid hyperammonemia propionic acidemia liver ureagenesls Effect of Propionic Acid on Fatty Acid Oxidation and U reagenesis ALLEN M. GLASGOW(23) AND H. PET ER C HASE UniversilY of Colorado Medical Celller, B. F. SlOlillsky LaboralOries , Denver, Colorado, USA Extract phosphate-buffered salin e, harvested with a brief treatment wi th tryps in- EDTA, washed twice with ph os ph ate-buffered saline, and Propionic acid significantly inhibited "CO z production from then suspended in ph os ph ate-buffe red saline (145 m M N a, 4.15 [I-"ejpalmitate at a concentration of 10 11 M in control fibroblasts m M K, 140 m M c/, 9.36 m M PO" pH 7.4) . I n mos t cases the cells and 100 11M in methyl malonic fibroblasts. This inhibition was we re incubated in 3 ml phosph ate-bu ffered sa lin e cont aining 0.5 similar to that produced by 4-pentenoic acid. Methylmalonic acid I1Ci ll-I4Cj palm it ate (19), final concentration approximately 3 11M also inhibited ' 'C0 2 production from [V 'ejpalmitate, but only at a added in 10 II I hexane. Increasing the amount of hexane to 100 II I concentration of I mM in control cells and 5 mM in methyl malonic did not impair palmit ate ox id ation. In two experiments (Fig. 3) the cells. fibroblasts were in cub ated in 3 ml calcium-free Krebs-Ringer Propionic acid (5 mM) also inhibited ureagenesis in rat liver phosphate buffer (2) co nt ain in g 5 g/ 100 ml essent iall y fatty ac id slices when ammonia was the substrate but not with aspartate and free bovine se rum albumin (20), I mM pa lm itate, and the same citrulline as substrates.
    [Show full text]
  • Dysmagnesemia in Covid-19 Cohort Patients: Prevalence and Associated Factors
    Magnesium Research 2020; 33 (4): 114-122 ORIGINAL ARTICLE Dysmagnesemia in Covid-19 cohort patients: prevalence and associated factors Didier Quilliot1, Olivier Bonsack1, Roland Jaussaud2, Andre´ Mazur3 1 Transversal Nutrition Unit and; 2 Internal Medicine and Clinical Immunology. Nancy University Hospital, University of Lorraine, France; 3 Universite´ Clermont Auvergne, INRAE, UNH, Unite´ de Nutrition Humaine, Clermont-Ferrand, France Correspondence <[email protected]> Abstract. Hypomagnesemia and hypermagnesemia could have serious implications and possibly lead to progress from a mild form to a severe outcome of Covid-19. Susceptibility of subjects with low magnesium status to develop and enhance this infection is possible. There is little data on the magnesium status of patients with Covid-19 with different degrees of severity. This study was conducted to evaluate prevalence of dysmagnesemia in a prospective Covid-19 cohort study according to the severity of the clinical manifestations and to identify factors associated. Serum magnesium was measured in 300 of 549 patients admitted to the hospital due to severe Covid-19. According to the WHO guidelines, patients were classified as moderate, severe, or critical. 48% patients had a magnesemia below 0.75 mmol/L (defined as magnesium deficiency) including 13% with a marked hypomagnesemia (<0.65 mmol/L). 9.6% had values equal to or higher than 0.95 mmol/L. Serum magnesium concentrations were significantly lower in female than in male (0.73 Æ 0.12 vs 0.80 Æ 0.13 mmol/L), whereas the sex ratio M/F was higher in severe and critical form (p<0.001). In a bivariate analysis, the risk of magnesium deficiency was significantly and negatively associated with infection severity (p<0.001), sex ratio (M/F, p<0.001), oxygenotherapy (p<0.001), stay in critical care unit (p=0.028), and positively with nephropathy (p=0.026).
    [Show full text]
  • Propionic Acidemia Information for Health Professionals
    Propionic Acidemia Information for Health Professionals Propionic acidemia is an organic acid disorder in which individuals are lacking or have reduced activity of the enzyme propionyl-CoA carboxylase, leading to propionic acidemia. Clinical Symptoms Symptoms generally begin in the first few days following birth. Metabolic crisis can occur, particularly after fasting, periods of illness/infection, high protein intake, or during periods of stress on the body. Symptoms of a metabolic crisis include lethargy, behavior changes, feeding problems, hypotonia, and vomiting. If untreated, metabolic crises can lead to tachypnea, brain swelling, cardiomyopathy, seizures, coma, basal ganglia stroke, and death. Many babies die within the first year of life. Lab findings during a metabolic crisis commonly include urine ketones, hyperammonemia, metabolic acidosis, low platelets, low white blood cells, and high blood ammonia and glycine levels. Long term effects may occur despite treatment and include developmental delay, brain damage, dystonia, failure to thrive, short stature, spasticity, pancreatitis, osteoporosis, and skin lesions. Incidence Propionic acidemia occurs in greater than 1 in 75,000 live births and is more common in Saudi Arabians and the Inuit population of Greenland. Genetics of propionic acidemia Mutations in the PCCA and PCCB genes cause propionic acidemia. Mutations prevent the production of or reduce the activity of propionyl-CoA carboxylase, which converts propionyl-CoA to methylmalonyl-CoA. This causes the body to be unable to correctly process isoleucine, valine, methionine, and threonine, resulting in an accumulation of glycine and propionic acid, which causes the symptoms seen in this condition. How do people inherit propionic acidemia? Propionic acidemia is inherited in an autosomal recessive manner.
    [Show full text]
  • Malignant Hyperthermia
    :: Malignant hyperthermia Synonyms: malignant hyperpyrexia, hyperthermia of anesthesia Syndromes with higher risk of MH: ` King-Denborough syndrome ` central core disease (CCD, central core myopathy) ` multiminicore disease (with or without RYR1 mutation) ` nemaline rod myopathy (with or without RYR1 mutation) ` hypokalemic periodic paralysis Definition: Malignant hyperthermia (MH) is a rare disorder of skeletal muscles related to a high release of calcium from the sarcoplasmic reticulum which leads to muscle rigidity in many cases and hypermetabolism. Abrupt onset is triggered either by anesthesic agents such as halogenated volatile anesthetics and depolarizing muscle relaxant such as succinylcholine (MH of anesthesia), or, occasionally, by stresses such as vigorous exercise or heat. In most cases, mutations of RYR1 and CACNA1S genes have been reported. MH is characterized by tachycardia, arrhythmia, muscle rigidity, hyperthermia, skin mottling, rhabdomyolysis (cola- colored urine) metabolic acidosis, electrolyte disturbances especially hyperkalemia and coagulopathy. Dantrolene is currently the only known treatment for a MH crisis. Further information: See the Orphanet abstract Menu Pre-hospital emergency care Recommendations for hospital recommendations emergency departments Synonyms Emergency issues Aetiology Emergency recommendations Special risks in emergency situations Management approach Frequently used long term treatments Drug interactions Complications Anesthesia Specific medical care prior to hospitalisation Preventive measures
    [Show full text]
  • Journal of Medical Genetics April 1992 Vol 29 No4 Contents Original Articles
    Journal of Medical Genetics April 1992 Vol 29 No4 Contents Original articles Beckwith-Wiedemann syndrome: a demonstration of the mechanisms responsible for the excess J Med Genet: first published as on 1 April 1992. Downloaded from of transmitting females C Moutou, C Junien, / Henry, C Bonai-Pellig 217 Evidence for paternal imprinting in familial Beckwith-Wiedemann syndrome D Viljoen, R Ramesar 221 Sex reversal in a child with a 46,X,Yp+ karyotype: support for the existence of a gene(s), located in distal Xp, involved in testis formation T Ogata, J R Hawkins, A Taylor, N Matsuo, J-1 Hata, P N Goodfellow 226 Highly polymorphic Xbol RFLPs of the human 21 -hydroxylase genes among Chinese L Chen, X Pan, Y Shen, Z Chen, Y Zhang, R Chen 231 Screening of microdeletions of chromosome 20 in patients with Alagille syndrome C Desmaze, J F Deleuze, A M Dutrillaux, G Thomas, M Hadchouel, A Aurias 233 Confirmation of genetic linkage between atopic IgE responses and chromosome 1 1 ql 3 R P Young, P A Sharp, J R Lynch, J A Faux, G M Lathrop, W 0 C M Cookson, J M Hopkini 236 Age at onset and life table risks in genetic counselling for Huntington's disease P S Harper, R G Newcombe 239 Genetic and clinical studies in autosomal dominant polycystic kidney disease type 1 (ADPKD1) E Coto, S Aguado, J Alvarez, M J Menendez-DIas, C Lopez-Larrea 243 Short communication Evidence for linkage disequilibrium between D16S94 and the adult onset polycystic kidney disease (PKD1) gene S E Pound, A D Carothers, P M Pignatelli, A M Macnicol, M L Watson, A F Wright 247 Technical note A strategy for the rapid isolation of new PCR based DNA polymorphisms P R Hoban, M F Santibanez-Koref, J Heighway 249 http://jmg.bmj.com/ Case reports Campomelic dysplasia associated with a de novo 2q;1 7q reciprocal translocation I D Young, J M Zuccollo, E L Maltby, N J Broderick 251 A complex chromosome rearrangement with 10 breakpoints: tentative assignment of the locus for Williams syndrome to 4q33-q35.1 R Tupler, P Maraschio, A Gerardo, R Mainieri G Lanzi L Tiepolo 253 on September 26, 2021 by guest.
    [Show full text]
  • FGFR2 Mutations in Pfeiffer Syndrome
    © 1995 Nature Publishing Group http://www.nature.com/naturegenetics correspondent FGFR2 mutations in Pfeiffer syndrome Sir-In the past few months, several genetic diseases have been ascribed to mutations in genes of the fibroblast growth factor receptor (FGFR) family, including achondroplasia (FGFR3) J-z, Crouzon syndrome (FGFR2)3 and 4 m/+ Pfeiffer syndrome (FGFR1) • In D321A addition, two clinically distinct N:Jl GIJ; AM craniosynostotic conditions, Jackson­ ~ Weiss and Crouzon syndromes, have c been ascribed to allelic mutations in the FGFR2 gene, suggesting that FGFR2mutations might have variable 5 phenotypic effects • We have recently FGFR2 found point mutations in the m/+ gene in two unrelated cases of Pfeiffer syndrome supporting the view that this craniosynostotic syndrome, is a 4 6 genetically heterogenous condition • • Pfeiffer syndrome is an autosomal dominant form of acrocephalo­ Fig. 1 Mutations of FGFR2 in two unrelated patients with craniofacial, hand syndactyly (ACS) characterized by and foot anomalies characteristic of Pfeiffer syndrome. Note midface craniosynostosis (brachycephaly retrusion, hypertelorism, proptosis and radiological evidence of enlargement type) with deviation and enlargement of thumb, with ankylosis of the second and third phalanges and the short, broad and deviated great toes. m, mutation; +, wild type sequence. The of the thumbs and great toes, sequence of wild type and mutant genes are shown and the arrow indicates brachymesophalangy, with pha­ the base substitution resulting in the mutation. langeal ankylosis and a varying degree of soft tissue syndactyly7.8. One of our sporadic cases and one familial form of ACS fulfilled the clinical criteria ofthe Pfeiffer syndrome, with particular respect to interphalangeal an aspartic acid into an alanine in the Elisabeth Lajeunie ankylosis (Fig.
    [Show full text]
  • Peripheral Neuropathy in Complex Inherited Diseases: an Approach To
    PERIPHERAL NEUROPATHY IN COMPLEX INHERITED DISEASES: AN APPROACH TO DIAGNOSIS Rossor AM1*, Carr AS1*, Devine H1, Chandrashekar H2, Pelayo-Negro AL1, Pareyson D3, Shy ME4, Scherer SS5, Reilly MM1. 1. MRC Centre for Neuromuscular Diseases, UCL Institute of Neurology and National Hospital for Neurology and Neurosurgery, London, WC1N 3BG, UK. 2. Lysholm Department of Neuroradiology, National Hospital for Neurology and Neurosurgery, London, WC1N 3BG, UK. 3. Unit of Neurological Rare Diseases of Adulthood, Carlo Besta Neurological Institute IRCCS Foundation, Milan, Italy. 4. Department of Neurology, University of Iowa, 200 Hawkins Drive, Iowa City, IA 52242, USA 5. Department of Neurology, University of Pennsylvania, Philadelphia, PA 19014, USA. * These authors contributed equally to this work Corresponding author: Mary M Reilly Address: MRC Centre for Neuromuscular Diseases, 8-11 Queen Square, London, WC1N 3BG, UK. Email: [email protected] Telephone: 0044 (0) 203 456 7890 Word count: 4825 ABSTRACT Peripheral neuropathy is a common finding in patients with complex inherited neurological diseases and may be subclinical or a major component of the phenotype. This review aims to provide a clinical approach to the diagnosis of this complex group of patients by addressing key questions including the predominant neurological syndrome associated with the neuropathy e.g. spasticity, the type of neuropathy, and the other neurological and non- neurological features of the syndrome. Priority is given to the diagnosis of treatable conditions. Using this approach, we associated neuropathy with one of three major syndromic categories - 1) ataxia, 2) spasticity, and 3) global neurodevelopmental impairment. Syndromes that do not fall easily into one of these three categories can be grouped according to the predominant system involved in addition to the neuropathy e.g.
    [Show full text]
  • Advances in Understanding the Genetics of Syndromes Involving Congenital Upper Limb Anomalies
    Review Article Page 1 of 10 Advances in understanding the genetics of syndromes involving congenital upper limb anomalies Liying Sun1#, Yingzhao Huang2,3,4#, Sen Zhao2,3,4, Wenyao Zhong1, Mao Lin2,3,4, Yang Guo1, Yuehan Yin1, Nan Wu2,3,4, Zhihong Wu2,3,5, Wen Tian1 1Hand Surgery Department, Beijing Jishuitan Hospital, Beijing 100035, China; 2Beijing Key Laboratory for Genetic Research of Skeletal Deformity, Beijing 100730, China; 3Medical Research Center of Orthopedics, Chinese Academy of Medical Sciences, Beijing 100730, China; 4Department of Orthopedic Surgery, 5Department of Central Laboratory, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China Contributions: (I) Conception and design: W Tian, N Wu, Z Wu, S Zhong; (II) Administrative support: All authors; (III) Provision of study materials or patients: All authors; (IV) Collection and assembly of data: Y Huang; (V) Data analysis and interpretation: L Sun; (VI) Manuscript writing: All authors; (VII) Final approval of manuscript: All authors. Correspondence to: Wen Tian. Hand Surgery Department, Beijing Jishuitan Hospital, Beijing 100035, China. Email: [email protected]. Abstract: Congenital upper limb anomalies (CULA) are a common birth defect and a significant portion of complicated syndromic anomalies have upper limb involvement. Mostly the mortality of babies with CULA can be attributed to associated anomalies. The cause of the majority of syndromic CULA was unknown until recently. Advances in genetic and genomic technologies have unraveled the genetic basis of many syndromes- associated CULA, while at the same time highlighting the extreme heterogeneity in CULA genetics. Discoveries regarding biological pathways and syndromic CULA provide insights into the limb development and bring a better understanding of the pathogenesis of CULA.
    [Show full text]
  • CACNA1S Gene Calcium Voltage-Gated Channel Subunit Alpha1 S
    CACNA1S gene calcium voltage-gated channel subunit alpha1 S Normal Function The CACNA1S gene provides instructions for making the main piece (subunit) of a structure called a calcium channel. Channels containing the CACNA1S protein are found in muscles used for movement (skeletal muscles). These skeletal muscle calcium channels play a key role in a process called excitation-contraction coupling, by which electrical signals (excitation) trigger muscle tensing (contraction). Calcium channels made with the CACNA1S subunit are located in the outer membrane of muscle cells, so they can transmit electrical signals from the cell surface to inside the cell. The channels interact with another type of calcium channel called ryanodine receptor 1 (RYR1) channels (produced from the RYR1 gene). RYR1 channels are located in the membrane of a structure inside the cell that stores calcium ions. Signals transmitted by CACNA1S-containing channels turn on (activate) RYR1 channels, which then release calcium ions inside the cells. The resulting increase in calcium ion concentration within muscle cells stimulates muscles to contract, allowing the body to move. Health Conditions Related to Genetic Changes Malignant hyperthermia CACNA1S gene mutations account for a very small percentage of all cases of malignant hyperthermia. Malignant hyperthermia is a severe reaction to particular anesthetic drugs that are often used during surgery and other invasive procedures. The reaction involves a high fever (hyperthermia), a rapid heart rate, muscle rigidity, breakdown of muscle fibers (rhabdomyolysis), and increased acid levels in the blood and other tissues ( acidosis). Complications can be life-threatening without prompt treatment. Researchers have identified several mutations in the CACNA1S gene that are associated with an increased risk of this condition.
    [Show full text]
  • Premature Loss of Permanent Teeth in Allgrove (4A) Syndrome in Two Related Families
    Iran J Pediatr Case Report Mar 2010; Vol 20 (No 1), Pp:101-106 Premature Loss of Permanent Teeth in Allgrove (4A) Syndrome in Two Related Families Zahra Razavi*1, MD; Mohammad­Mehdi Taghdiri¹, MD; Fatemeh Eghbalian¹, MD; Nooshin Bazzazi², MD 1. Department of Pediatrics, Hamadan University of Medical Sciences, IR Iran 2. Department of Ophthalmology, Hamadan University of Medical Sciences, IR Iran Received: Feb 07, 2009; Final Revision: Apr 27, 2009; Accepted: May 06, 2009 Abstract Background: Allgrove syndrome is a rare autosomal recessive condition characterized by adrenal insufficiency, achalasia, alacrima and occasionally autonomic disturbances. Mutations in the AAAS gene, on chromosome 12q13 have been implicated as a cause of this disorder. Case(s) Presentation: We present various manifestations of this syndrome in two related families each with two affected siblings in which several members had symptoms including reduced tear production, mild developmental delay, achalasia, neurological disturbances and also premature loss of permanent teeth in two of them, Conclusion: The importance of this report is dental involvement (loss of permanent teeth) in Allgrove syndrome that has not been reported in literature. Iranian Journal of Pediatrics, Volume 20 (Number 1), March 2010, Pages: 101­106 Key Words: Achalasia, Adrenocortical Insufficiency, Alacrimia (Allgrove, triple‐A) Protein, Human; AAAS Protein, Human; Teeth; Allgrove Syndrome; Triple A Syndrome Protein, Human Introduction autonomic disturbances associated with Allgrove syndrome leading one author to In 1978 Allgrove and colleagues described 2 recommend the name 4A syndrome (adreno‐ unrelated pairs of siblings with achalasia and cortical insufficiency, achalasia of cardia, ACTH insensivity, three had impaired alacrima and autonomic abnormalities)[2‐4].
    [Show full text]
  • American Board of Psychiatry and Neurology, Inc
    AMERICAN BOARD OF PSYCHIATRY AND NEUROLOGY, INC. CERTIFICATION EXAMINATION IN NEUROLOGY 2015 Content Blueprint (January 13, 2015) Part A Basic neuroscience Number of questions: 120 01. Neuroanatomy 3-5% 02. Neuropathology 3-5% 03. Neurochemistry 2-4% 04. Neurophysiology 5-7% 05. Neuroimmunology/neuroinfectious disease 2-4% 06. Neurogenetics/molecular neurology, neuroepidemiology 2-4% 07. Neuroendocrinology 1-2% 08. Neuropharmacology 4-6% Part B Behavioral neurology, cognition, and psychiatry Number of questions: 80 01. Development through the life cycle 3-5% 02. Psychiatric and psychological principles 1-3% 03. Diagnostic procedures 1-3% 04. Clinical and therapeutic aspects of psychiatric disorders 5-7% 05. Clinical and therapeutic aspects of behavioral neurology 5-7% Part C Clinical neurology (adult and child) The clinical neurology section of the Neurology Certification Examination is comprised of 60% adult neurology questions and 40% child neurology questions. Number of questions: 200 01. Headache disorders 1-3% 02. Pain disorders 1-3% 03. Epilepsy and episodic disorders 1-3% 04. Sleep disorders 1-3% 05. Genetic disorders 1-3% 2015 ABPN Content Specifications Page 1 of 22 Posted: Certification in Neurology AMERICAN BOARD OF PSYCHIATRY AND NEUROLOGY, INC. 06. Congenital disorders 1-3% 07. Cerebrovascular disease 1-3% 08. Neuromuscular diseases 2-4% 09. Cranial nerve palsies 1-3% 10. Spinal cord diseases 1-3% 11. Movement disorders 1-3% 12. Demyelinating diseases 1-3% 13. Neuroinfectious diseases 1-3% 14. Critical care 1-3% 15. Trauma 1-3% 16. Neuro-ophthalmology 1-3% 17. Neuro-otology 1-3% 18. Neurologic complications of systemic diseases 2-4% 19.
    [Show full text]