Ollier Disease: Pathogenesis, Diagnosis, and Management

Total Page:16

File Type:pdf, Size:1020Kb

Ollier Disease: Pathogenesis, Diagnosis, and Management See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/278787870 Ollier Disease: Pathogenesis, Diagnosis, and Management Article in Orthopedics · June 2015 DOI: 10.3928/01477447-20150603-58 · Source: PubMed CITATIONS READS 11 115 4 authors, including: Vijay K Jain Minakshi Bhardwaj Postgraduate Institute of Medical Education and Research PGIMER ,Dr. Ram Manohar Lohia Hospital,New Delhi,India 24 PUBLICATIONS 161 CITATIONS 122 PUBLICATIONS 301 CITATIONS SEE PROFILE SEE PROFILE Some of the authors of this publication are also working on these related projects: Rare tumour of salivary gland View project PUBLICATION View project All content following this page was uploaded by Minakshi Bhardwaj on 02 February 2016. The user has requested enhancement of the downloaded file. n Feature Article Ollier Disease: Pathogenesis, Diagnosis, and Management AVINASH KUMAR, MS; VIJAY KUMAR JAIN, MS; MINAKSHI BHARADWAJ, MD; RAJENDRA KUMAR ARYA, MS abstract Ollier disease (Spranger type I) is a rare bone disease that is characterized by mul- tiple enchondromatosis with a typical asymmetrical distribution and confined to the appendicular skeleton. The pathogenesis of enchondromatosis is not clearly understood. Recently, heterozygous mutations of PTHR1, IDH1 (most common), and/or IDH2 genes have been suggested by various authors as genetic aberrations. Genomic copy number alterations and mutations controlling many vital pathways are responsible for the pathogenesis of Ollier disease. A comprehensive description of all genetic events in Ollier disease is presented in this article. Clinically, Ollier disease has a wide variety of presentations. This article describes the plethora of clinical features, both common and rare, associated with Ollier disease. Multiple en- chondromas are most commonly seen in phalanges and metacarpals. Radiologically, Ollier disease presents with asymmetrical osteolytic lesions with well-defined, scle- rotic margins. In this article, various radiological features of Ollier disease, including radiographs, computed tomography, and magnetic resonance imaging, are also dis- cussed. Gross pathology, cytological, and histological features of both Ollier disease and its malignant transformation are outlined. Although treatment is conservative in most cases, different possible treatment options for difficult cases are discussed. In the literature, there is a paucity of data about the disease, including diagnosis, man- agement, prognostication, and rehabilitation, necessitating a comprehensive review to further define all of the possible domains related to this disease. Orthopedics.[ 2015; 38(6):e497-e506.] The authors are from the Department of Orthopedics (AK, VKJ, RKA) and the Department of Pathol- ogy (MB), PGIMER, Ram Manohar Lohia Hospital, New Delhi, India. The authors have no relevant financial relationships to disclose. Correspondence should be addressed to: Vijay Kumar Jain, MS, Department of Orthopedics, PGIMER, Ram Manohar Lohia Hospital, New Delhi, India 110001 ([email protected]). Received: January 12, 2014; Accepted: August 4, 2014. doi: 10.3928/01477447-20150603-58 JUNE 2015 | Volume 38 • Number 6 e497 n Feature Article hondromas are benign, generally asymptomatic tumors of hyaline Table 1 cartilage that are most commonly C Historical Contributions to the Evolution of Ollier Disease located in the phalanges of the hand. They are called enchondromas when they arise Year Author(s) Contribution 8,9 from the medullary canal. Rarely, they 1898 Ollier Coined dyschondroplasie (described as a unilateral lesion) arise on the surface of the bone and are 1923 Bentzon10 Interpreted as a typical reaction of the bones to an active hyperemia of the bone tissues, resulting from the anoma- referred to as periosteal chondromas or lies of the sympathetic nervous system juxtacortical chondromas. 1935 Hunter and Wiles11 First to identify the key distinguishing features such as a Enchondromas are the second most lack of heredity, childhood onset, and unilateral involve- common benign cartilaginous tumor af- ment in Ollier disease ter osteochondromas.1 Enchondromato- 1958 Jaffe12 Defined as the presence of either circumscribed foci or sis,2 or Ollier disease, is defined by the large masses of cartilage in the interior of bones presence of multiple enchondromas (3 or 1978 Spranger et al5 Classified and termed Ollier disease as multiple enchon- dromatosis more) and characterized by an asymmetric distribution of cartilaginous lesions that can be extremely variable in terms of their size, number, location, evolution, age of Table 2 onset and diagnosis, and requirement for Classification of Multiple Enchondromatosis surgery. The association of lymphangio- a mas with Ollier disease and Maffucci syn- Condition Clinical Features drome (another enchondromatosis) has Ollier disease (Spranger type I) Multiple enchondromas of tubular and flat bones, predominantly unilateral been described in the literature.3,4 Maffucci syndrome (Spranger type II) Same as Ollier disease, with hemangiomas EPIDEMIOLOGY AND CLASSIFICATION Metachondromatosis (Spranger type III) Multiple enchondromas and exostoses The estimated prevalence of Ollier dis- Spondyloenchondrodysplasia (Spranger Multiple enchondromas with severe platyspon- type IV) dyly ease is 1 in 100,000.5-7 The true incidence of Ollier disease may be higher because Enchondromatosis with irregular spinal Multiple enchondromas with dysplasia of ver- lesions (Spranger type V) tebral bodies mild phenotypes without skeletal defor- Cheirospondyloenchondromatosis (for- Multiple enchondromas, severe hand and foot mities are sometimes not detected. Few merly generalized enchondromatosis) involvement, mild platyspondyly, erosion of cases of familial occurrence have been (Spranger type VI) iliac crests reported (Table 1).13-15 Dysspondylochondromatosis Multiple appendicular enchondromas with Spranger et al5 created a comprehen- hemivertebrae, dwarfism, limb-length dis- crepancy sive classification of enchondromato- Genochondromatosis Medial clavicular enlargement, lucent lesions ses based on radiographic appearance, of long bones anatomic site, and mode of inheritance. aSpranger type IV and genochondromatosis do not involve the hands, whereas other types, They divided enchondromatosis into 6 especially types I, II, III, and VI, do involve the hands. subtypes: type I, Ollier disease; type II, Maffucci syndrome; type III, metachon- dromatosis; type IV, spondyloenchon- drodysplasia; type V, enchondromatosis with mucopolysacchariduria, and enchon- ease is basically an abnormality of devel- with irregular spinal lesions; and type VI, dromatosis with concave vertebral bod- opment of the limb bud, which, in post- cheirospondyloenchondromatosis. Most ies. The modified Spranger classification fetal life, causes the long bones to grow in subtypes are nonhereditary, whereas some system is widely used to address types of diameter but not in length. Table 3 sum- are autosomal dominant or recessive. Ha- enchondromatosis, and the common sub- marizes all the proposed theories regard- lal and Azouz16 later added 3 subtypes to types are listed in Table 2.17 ing the pathogenesis of Ollier disease. this classification system based on case In 1943, Jaffe and Lichtenstein18 pro- reports of enchondromatosis: generalized PATHOPHYSIOLOGY posed that enchondromatous lesions are enchondromatosis with irregular vertebral The pathogenesis of enchondromatosis actually the displaced cartilaginous rests lesions, generalized enchondromatosis is still not clearly understood. Ollier dis- of normal physeal cartilage cells. This e498 COPYRIGHT © SLACK INCORPORATED n Feature Article theory is still widely accepted regarding the genesis of enchondroma. There are Table 3 formations of intraosseous cartilaginous Proposed Theories for the Pathogenesis of Ollier Disease foci in enchondromas that might result Displaced remnants of normal physeal cartilage cells18 from the abnormalities in signaling path- Hamartomatous growth of cartilage cells19-21 ways controlling the proliferation and dif- Failure of endochondral ossification22 24 ferentiation of chondrocytes. Migration of dysplastic nidus from physeal proliferative zone to primary ossification Heterozygous mutations24,25 and mis- zone in metaphyses23 24 sense mutations in parathyroid-related Failure of terminal differentiation of growth plate chondrocytes24 peptide type 1 receptor (PTHR1) or dys- Heterozygous mutations of PTHR1 gene25 regulation in the Indian hedgehog sig- Heterozygous mutations of IDH1 and/or IDH2 gene26-28 naling pathway (eg, overexpression of Loss of chromosomes (Chr 6 and Chr 3), deletions, amplifications, gains, and other hedgehog transcriptional regulator GLI2 genomic copy number neutral structural changes of subtle genes29,30 or activation of a hedgehog-responsive Familial31 GLI2-luciferase in a PTHR1 mutant25) may cause development of enchondroma- tous lesions in patients with Ollier disease. Recently, heterozygous mutations in also been reported in early adolescence the isocitrate dehydrogenase (IDH) gene and adulthood.37,38 These lesions usually Table 4 have been related to Ollier disease, mainly appear and grow before puberty but soon IDH1 (98%) and IDH2 (2%).26-28 These remodel into normal bone.6,39 Whereas Clinical Presentations of mutations exhibited a phenomenon of enchondromas occur equally in both sex- Ollier Disease intraneoplastic mosaicism similar to that es, Ollier disease is seen twice as often in Multiple swellings
Recommended publications
  • Bone and Soft Tissue Tumors Have Been Treated Separately
    EPIDEMIOLOGY z Sarcomas are rare tumors compared to other BONE AND SOFT malignancies: 8,700 new sarcomas in 2001, with TISSUE TUMORS 4,400 deaths. z The incidence of sarcomas is around 3-4/100,000. z Slight male predominance (with some subtypes more common in women). z Majority of soft tissue tumors affect older adults, but important sub-groups occur predominantly or exclusively in children. z Incidence of benign soft tissue tumors not known, but Fabrizio Remotti MD probably outnumber malignant tumors 100:1. BONE AND SOFT TISSUE SOFT TISSUE TUMORS TUMORS z Traditionally bone and soft tissue tumors have been treated separately. z This separation will be maintained in the following presentation. z Soft tissue sarcomas will be treated first and the sarcomas of bone will follow. Nowhere in the picture….. DEFINITION Histological z Soft tissue pathology deals with tumors of the classification connective tissues. of soft tissue z The concept of soft tissue is understood broadly to tumors include non-osseous tumors of extremities, trunk wall, retroperitoneum and mediastinum, and head & neck. z Excluded (with a few exceptions) are organ specific tumors. 1 Histological ETIOLOGY classification of soft tissue tumors tumors z Oncogenic viruses introduce new genomic material in the cell, which encode for oncogenic proteins that disrupt the regulation of cellular proliferation. z Two DNA viruses have been linked to soft tissue sarcomas: – Human herpes virus 8 (HHV8) linked to Kaposi’s sarcoma – Epstein-Barr virus (EBV) linked to subtypes of leiomyosarcoma z In both instances the connection between viral infection and sarcoma is more common in immunosuppressed hosts.
    [Show full text]
  • Advances in the Pathogenesis and Possible Treatments for Multiple Hereditary Exostoses from the 2016 International MHE Conference
    Connective Tissue Research ISSN: 0300-8207 (Print) 1607-8438 (Online) Journal homepage: https://www.tandfonline.com/loi/icts20 Advances in the pathogenesis and possible treatments for multiple hereditary exostoses from the 2016 international MHE conference Anne Q. Phan, Maurizio Pacifici & Jeffrey D. Esko To cite this article: Anne Q. Phan, Maurizio Pacifici & Jeffrey D. Esko (2018) Advances in the pathogenesis and possible treatments for multiple hereditary exostoses from the 2016 international MHE conference, Connective Tissue Research, 59:1, 85-98, DOI: 10.1080/03008207.2017.1394295 To link to this article: https://doi.org/10.1080/03008207.2017.1394295 Published online: 03 Nov 2017. Submit your article to this journal Article views: 323 View related articles View Crossmark data Citing articles: 1 View citing articles Full Terms & Conditions of access and use can be found at https://www.tandfonline.com/action/journalInformation?journalCode=icts20 CONNECTIVE TISSUE RESEARCH 2018, VOL. 59, NO. 1, 85–98 https://doi.org/10.1080/03008207.2017.1394295 PROCEEDINGS Advances in the pathogenesis and possible treatments for multiple hereditary exostoses from the 2016 international MHE conference Anne Q. Phana, Maurizio Pacificib, and Jeffrey D. Eskoa aDepartment of Cellular and Molecular Medicine, Glycobiology Research and Training Center, University of California, San Diego, La Jolla, CA, USA; bTranslational Research Program in Pediatric Orthopaedics, Division of Orthopaedic Surgery, The Children’s Hospital of Philadelphia, Philadelphia, PA, USA ABSTRACT KEYWORDS Multiple hereditary exostoses (MHE) is an autosomal dominant disorder that affects about 1 in 50,000 Multiple hereditary children worldwide. MHE, also known as hereditary multiple exostoses (HME) or multiple osteochon- exostoses; multiple dromas (MO), is characterized by cartilage-capped outgrowths called osteochondromas that develop osteochondromas; EXT1; adjacent to the growth plates of skeletal elements in young patients.
    [Show full text]
  • Exostoses, Enchondromatosis and Metachondromatosis; Diagnosis and Management
    Acta Orthop. Belg., 2016, 82, 102-105 ORIGINAL STUDY Exostoses, enchondromatosis and metachondromatosis; diagnosis and management John MCFARLANE, Tim KNIGHT, Anubha SINHA, Trevor COLE, Nigel KIELY, Rob FREEMAN From the Department of Orthopaedics, Robert Jones Agnes Hunt Hospital, Oswestry, UK We describe a 5 years old girl who presented to the region of long bones and are composed of a carti- multidisciplinary skeletal dysplasia clinic following lage lump outside the bone which may be peduncu- excision of two bony lumps from her fingers. Based on lated or sessile, the knee is the most common clinical examination, radiolographs and histological site (1,10). An isolated exostosis is a common inci- results an initial diagnosis of hereditary multiple dental finding rarely requiring treatment. Disorders exostosis (HME) was made. Four years later she developed further lumps which had the radiological associated with exostoses include HME, Langer- appearance of enchondromas. The appearance of Giedion syndrome, Gardner syndrome and meta- both exostoses and enchondromas suggested a possi- chondromatosis. ble diagnosis of metachondromatosis. Genetic testing Enchondroma are the second most common be- revealed a splice site mutation at the end of exon 11 on nign bone tumour characterised by the formation of the PTPN11 gene, confirming the diagnosis of meta- hyaline cartilage in the medulla of a bone. It occurs chondromatosis. While both single or multiple exosto- most frequently in the hand (60%) and then the feet. ses and enchondromas occur relatively commonly on The typical radiological features are of a well- their own, the appearance of multiple exostoses and defined lucent defect with endosteal scalloping and enchondromas together is rare and should raise the differential diagnosis of metachondromatosis.
    [Show full text]
  • SKELETAL DYSPLASIA Dr Vasu Pai
    SKELETAL DYSPLASIA Dr Vasu Pai Skeletal dysplasia are the result of a defective growth and development of the skeleton. Dysplastic conditions are suspected on the basis of abnormal stature, disproportion, dysmorphism, or deformity. Diagnosis requires Simple measurement of height and calculation of proportionality [<60 inches: consideration of dysplasia is appropriate] Dysmorphic features of the face, hands, feet or deformity A complete physical examination Radiographs: Extremities and spine, skull, Pelvis, Hand Genetics: the risk of the recurrence of the condition in the family; Family evaluation. Dwarf: Proportional: constitutional or endocrine or malnutrition Disproportion [Trunk: Extremity] a. Height < 42” Diastrophic Dwarfism < 48” Achondroplasia 52” Hypochondroplasia b. Trunk-extremity ratio May have a normal trunk and short limbs (achondroplasia), Short trunk and limbs of normal length (e.g., spondylo-epiphyseal dysplasia tarda) Long trunk and long limbs (e.g., Marfan’s syndrome). c. Limb-segment ratio Normal: Radius-Humerus ratio 75% Tibia-Femur 82% Rhizomelia [short proximal segments as in Achondroplastics] Mesomelia: Dynschondrosteosis] Acromelia [short hands and feet] RUBIN CLASSIFICATION 1. Hypoplastic epiphysis ACHONDROPLASTIC Autosomal Dominant: 80%; 0.5-1.5/10000 births Most common disproportionate dwarfism. Prenatal diagnosis: 18 weeks by measuring femoral and humeral lengths. Abnormal endochondral bone formation: zone of hypertrophy. Gene defect FGFR fibroblast growth factor receptor 3 . chromosome 4 Rhizomelic pattern, with the humerus and femur affected more than the distal extremities; Facies: Frontal bossing; Macrocephaly; Saddle nose Maxillary hypoplasia, Mandibular prognathism Spine: Lumbar lordosis and Thoracolumbar kyphosis Progressive genu varum and coxa valga Wedge shaped gaps between 3rd and 4th fingers (trident hands) Trident hand 50%, joint laxity Pathology Lack of columnation Bony plate from lack of growth Disorganized metaphysis Orthopaedics 1.
    [Show full text]
  • Imaging in Osteogenesis Imperfecta
    Paediatr Croat. 2017;61:122-8 PREGLED / REVIEW www.paedcro.com http://dx.doi.org/10.13112/PC.2017.17 Imaging in osteogenesis imperfecta Igor Borić, Renata Prpić Vučković* Osteogenesis imperfecta (OI) is a congenital genetic disorder with skeletal or extra-skeletal manifestations. Phenotypic features and mode of inheritance, clinical features, and radiographic fi ndings make the basis for the currently accepted classifi cation system of OI. The antenatal and postnatal diagnosis of the disease using diff erent radiographic methods (plain radiography, ultrasonography, computed tomography and magnetic resonance imaging) is described and characteristic appearances of bone and other defor- mities are analyzed. Distinctive bone manifestations of OI are illustrated using typical examples. Finally, we give a comment on diff erential diagnosis. Key words: osteogenesis imperfecta, radiography, imaging Osteogenesis imperfecta (OI) is a congenital, genetic disor- od: radiography, ultrasonography (US), computed tomogra- der of collagen type I synthesis that involves connective tis- phy (CT) and magnetic resonance imaging (MRI) (3, 7, 8). sues and bones, and is characterized by increased bone The preferred radiographic examination for initial investiga- fragility and decreased bone density. There is extreme varia- tion of OI is plain radiography because most of the imaging tion in clinical symptoms based on genetics and subtypes characteristics of this disease are apparent on plain radio- including blue sclera, dental fragility, and hearing loss. De- graphs. pending on the disease severity, bone fragility may lead to Prenatal ultrasonography plays a role in the diagnosis of OI; perinatal death or can cause severe deformities that persist typical fi ndings include fractures, decreased calvarial ossifi ca- into adulthood (1, 2).
    [Show full text]
  • Multiple Hereditary Exostoses
    Multiple Hereditary Exostoses Dror Paley MD, FRCSC Medical Director, Paley Orthopedic and spine Institute, St. Mary’s Medical Center, West palm Beach, FL David Feldman, MD Director, Spinal deformity center, Paley Orthopedic and spine Institute, St. Mary’s Medical Center, West palm Beach, FL Multiple hereditary exostoses (MHE), also known as multiple osteochondromas (MO), is an autosomal dominant skeletal disorder. Approximately 10–20% of individuals are a result of a spontaneous mutation while the rest are familial. The prevalence of MHE/MO is 1/50 000. There are two known genes found to cause MHE/MO, EXT1 located on chromosome 8q23-q24 and EXT2 located on chromosome 11p11-p12. In 10–15% of the patients, no mutation can be located by current methods of genetic testing.1–7 These mutations are scattered across both genes. EXT1/EXT2 is essential for the biosynthesis of heparan sulfate (HS). HS production in patients’ cells is reduced by 50% or more.8–19 MHE/MO is associated with characteristic progressive skeletal deformities of the extremities and shortening of one or both the sides, leading to limb length discrepancy (LLD) and short stature.20–28 Two bone segments, such as the lower leg or forearm, are at greater risk of problems due to either osteochondromas (OCs) from one or both bones impinging on or deforming the other bone or a primary issue of altered growth causing one bone to grow at a faster or slower rate. OCs can also affect joint motion due to impingement of an OC with the opposite side of the joint or subluxation/dislocation related to deformity, impingement, and incongruity.20,24,26,29,30 OCs can also cause nerve or vessel entrapment and/or compression, including the spinal cord and nerve roots.
    [Show full text]
  • Osteochondroma: Ignore Or Investigate?
    r e v b r a s o r t o p . 2 0 1 4;4 9(6):555–564 www.rbo.org.br Updating Article ଝ Osteochondroma: ignore or investigate? a b,c,∗ Antônio Marcelo Gonc¸alves de Souza , Rosalvo Zósimo Bispo Júnior a School of Medicine, Federal University of Pernambuco (UFPE), Recife, PE, Brazil b School of Medicine, Federal University of Paraíba (UFPB), João Pessoa, PB, Brazil c University Center of João Pessoa (UNIPÊ), João Pessoa, PB, Brazil a r a t i b s c t l e i n f o r a c t Article history: Osteochondromas are bone protuberances surrounded by a cartilage layer. They generally Received 23 August 2013 affect the extremities of the long bones in an immature skeleton and deform them. They usu- Accepted 31 October 2013 ally occur singly, but a multiple form of presentation may be found. They have a very charac- Available online 27 October 2014 teristic appearance and are easily diagnosed. However, an atypical site (in the axial skeleton) and/or malignant transformation of the lesion may sometimes make it difficult to iden- Keywords: tify osteochondromas immediately by means of radiographic examination. In these cases, Osteochondroma/etiology imaging examinations that are more refined are necessary. Although osteochondromas Osteochondroma/physiopathology do not directly affect these patients’ life expectancy, certain complications may occur, with Osteochondroma/diagnosis varying degrees of severity. Bone neoplasms © 2014 Sociedade Brasileira de Ortopedia e Traumatologia. Published by Elsevier Editora Ltda. All rights reserved. Osteocondroma: ignorar ou investigar? r e s u m o Palavras-chave: Osteocondromas são protuberâncias ósseas envolvidas por uma camada de cartilagem.
    [Show full text]
  • New Therapeutic Targets in Rare Genetic Skeletal Diseases
    Briggs MD, Bell PA, Wright MJ, Pirog KA. New therapeutic targets in rare genetic skeletal diseases. Expert Opinion on Orphan Drugs 2015, 3(10), 1137- 1154. Copyright: ©2015 The Author(s). Published by Taylor & Francis. DOI link to article: http://dx.doi.org/10.1517/21678707.2015.1083853 Date deposited: 16/10/2015 This work is licensed under a Creative Commons Attribution 4.0 International License Newcastle University ePrints - eprint.ncl.ac.uk Expert Opinion on Orphan Drugs ISSN: (Print) 2167-8707 (Online) Journal homepage: http://www.tandfonline.com/loi/ieod20 New therapeutic targets in rare genetic skeletal diseases Michael D Briggs PhD , Peter A Bell PhD, Michael J Wright MB ChB MSc FRCP & Katarzyna A Pirog PhD To cite this article: Michael D Briggs PhD , Peter A Bell PhD, Michael J Wright MB ChB MSc FRCP & Katarzyna A Pirog PhD (2015) New therapeutic targets in rare genetic skeletal diseases, Expert Opinion on Orphan Drugs, 3:10, 1137-1154, DOI: 10.1517/21678707.2015.1083853 To link to this article: http://dx.doi.org/10.1517/21678707.2015.1083853 © 2015 The Author(s). Published by Taylor & Francis. Published online: 24 Sep 2015. Submit your article to this journal Article views: 102 View related articles View Crossmark data Full Terms & Conditions of access and use can be found at http://www.tandfonline.com/action/journalInformation?journalCode=ieod20 Download by: [Newcastle University] Date: 16 October 2015, At: 07:31 Review New therapeutic targets in rare genetic skeletal diseases † Michael D Briggs , Peter A Bell, Michael J Wright & Katarzyna A Pirog † 1. Introduction Newcastle University, Institute of Genetic Medicine, International Centre for Life, Newcastle-upon-Tyne, UK 2.
    [Show full text]
  • Bioengineering the Fracture Callus: Bone Repair Through Fracture Mimetics
    Bioengineering The Fracture Callus: Bone Repair Through Fracture Mimetics By Wollis Jude Vas Thesis submitted in fulfilment of the requirements for the degree of Doctor of Philosophy in the Division of Surgery and Interventional Science at University College London. November 2018 1 Acknowledgements Firstly, I would like to thank Dr Scott Roberts for providing me with the opportunity to peruse my PhD. His extensive knowledge of bone biology and tissue engineering has helped guide and shape this project, without whom this project would not be possible. I would also like to thank ORUK for providing me with the funding that supported my PhD programme and made this work possible. The members of the research group have also made massive contributions to the work being presented in this thesis, I would, especially, like to thank Dr Mittal Shah for supporting and guiding me through many of the challenges I faced. Dr Umber Cheema has also ensured that I experienced the full benefits of being the student at the division. Overall, I would like to extend my gratitude to the members of IOMS, who were there to show me the ropes as I started my journey as a PhD student. I would like to thank Prof Frank Luyten for his contribution of human periosteal stem cells, used extensively throughout my work. I would also like to thank Prof Duchen and Dr Blacker for lending me their support and expertise with the SHG/FLIM imaging. I would like to thank again the Co-Authors Dr Mittal Shah, Rawiya Al Hosni, Dr Helen C Owen and Dr Scott Roberts who contributed to my published literature review which was the basis for the introduction to my thesis.
    [Show full text]
  • WO 2018/049285 Al 15 March 2018 (15.03.2018) W !P O PCT
    (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (10) International Publication Number (43) International Publication Date WO 2018/049285 Al 15 March 2018 (15.03.2018) W !P O PCT (51) International Patent Classification: INC. [US/US]; 530 Fairview Avenue North, Suite 1400, A61K 38/00 (2006.01) C12Q 1/37 (2006.01) Seattle, WA 98109 (US). A61K 9/00 (2006.01) (72) Inventors: GIRARD, Emily, June; 16724 Woodside Dri (21) International Application Number: ve SE, Renton, WA 98058 (US). CORRENTI, Colin; PCT/US2017/050855 5850 57th Avenue NE, Seattle, WA 98105 (US). OLSON, James; 4733 Lake Washington Boulevard South, Seattle, (22) International Filing Date: WA 981 18 (US). NAIRN, Natalie, Winblade; 741 1 48th 09 September 2017 (09.09.2017) Avenue NE, Seattle, WA 981 15 (US). GEWE, Mesfln, (25) Filing Language: English Mulugeta; 428 218th Street SW, Bothell, WA 98021 (US). MEHLIN, Christopher; 2806 NW 61st Street, Seattle, (26) Publication Language: English WA 98107 (US). CROOK, Zachary; 18617 19th Drive (30) Priority Data: SE, Bothell, WA 98102 (US). STRONG, Roland; 1700 62/385,908 09 September 2016 (09.09.2016) US North Northlake Way #209, Seattle, WA 98103 (US). 62/432,487 09 December 20 16 (09. 12.20 16) US PRESNELL, Scott, Ronald; 2902 North Puget Sound Av 62/447,869 18 January 2017 (18.01.2017) US enue, Tacoma, WA 98407 (US). 62/5 10,710 24 May 2017 (24.05.2017) US (74) Agent: HOLZAPFEL, Keli, L. et al; Wilson Sonsini (71) Applicants: FRED HUTCHINSON CANCER Goodrich & Rosati, 650 Page Mill Road, Palo Alto, CA RESEARCH CENTER [US/US]; 1100 Fairview Avenue 94304-1050 (US).
    [Show full text]
  • Osteochondroma of the Femoral Neck: a Rare Cause of Sciatic Nerve Compression Page 1 of 7
    Osteochondroma of the Femoral Neck: A Rare Cause of Sciatic Nerve Compression Page 1 of 7 HOME OF: Home Blogs News Wire iPhone App Multimedia Classified Marketplace E HIP ORTHOPEDICS August 2010;33(8):597. Osteochondroma of the Femoral Neck: A of Sciatic Nerve Compression Meetings & Courses by Kimberly Yu, BS; John P. Meehan, MD; Anto Fritz, MD; Amir A. Jamali, MD Featured Meetings Submit a Comment Print E-mail Abstract EFORT A 39-year-old man presented with weakness and a nonmobile mass in the butto Topics Hip flexion was limited to 70°. Strength was diminished for both ankle/foot planta Arthritis Sensation was decreased on the plantar and dorsal foot. A pedunculated osseo Arthroscopy on the posterior femoral neck was seen on plain radiographs and magnetic reso Biologics Electromyography showed moderate sciatic neuropathy of the peroneal and tibia underwent excision of the tumor through a posterior approach. Due to the risk of Business of Orthopedics 7.3-mm cannulated screws were passed percutaneously into the head with fluor Foot and Ankle pathological report indicated the tumor was an osteochondroma. At 22-month fo Hand/Upper Extremity resolution of the neurologic findings. Postoperatively, the patient reported improv Hip tingling in the leg but continued to have moderate buttock pain. Left hip flexion in follow-up. Imaging Infection The importance of protecting the medial femoral circumflex artery during approa Knee paramount. In this case, the tumor arose from the central aspect of the quadratu muscle protecting the medial femoral circumflex artery from harm. Although oste Oncology cause of mass effect, they should be considered in the differential diagnosis of s Osteoporosis this anatomical location.
    [Show full text]
  • Autosomal Dominant Osteopetrosis (ADO) Service At
    Bristol Genetics Laboratory is a UKAS accredited medical laboratory No.9307. Autosomal Recessive/Infantile/Malignant Osteopetrosis (ARO) Autosomal Dominant/late-onset Osteopetrosis (ADO) (Albers-Schonberg disease) Clinical Background and Genetics Contact details: The osteopetroses are a heterogeneous group of disorders characterized by an Bristol Genetics Laboratory increased bone density due to impaired bone resorption. Pathology Sciences Southmead Hospital AR malignant infantile osteopetrosis (ARO) typically results in severe disease in Bristol, BS10 5NB infancy (OMIM 259700), patients may present with generalized increase in bone Enquiries: 0117 414 6168 density, predisposition to bone fractures, osteomyelitis, macrocephaly, frontal FAX: 0117 414 6464 bossing, progressive deafness and blindness, hepatosplenomegaly, and severe anaemia/pancytopenia. Incidence is 1:250,000 in UK Head of Department: ADO presents primarily with skeletal fractures and osteomyelitis from late Professor Rachel Butler, FRCPath childhood to adulthood. Hearing/visual loss may affect around 5% of individuals. Consultant Clinical Scientist Non-penetrance of ADO has long been recognized, with an estimated 1/3 of individuals inheriting a CLCN7 pathogenic variant NOT manifesting the ADO phenotype. Members of the same family carrying the same gene variant can Consultant Lead for Rare Disease: therefore have extremely variable presentation. This may be due to modifier Maggie Williams, FRCPath genes Consultant Lead for Oncology: At least 10 genes are thought to account for 70% of all osteopetrosis cases, with 7 accounting for 80% of ARO cases. TNFSF11 (RANKL) and TNFRSF11A Christopher Wragg, FRCPath (RANK) pathogenic variants are associated with reduced numbers of osteoclasts. A proportion of cases remain unidentified, implying further as yet Service Lead: unknown genes are involved in the disease.
    [Show full text]