Blueprint Genetics Skeletal Dysplasia with Abnormal Mineralization Panel
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Skeletal Dysplasia with Abnormal Mineralization Panel Test code: MA1301 Is a 34 gene panel that includes assessment of non-coding variants. Is ideal for patients with a clinical suspicion of hypophosphatasia or hypophosphatemic rickets. The genes on this panel are included in the Comprehensive Growth Disorders / Skeletal Dysplasias and Disorders Panel. About Skeletal Dysplasia with Abnormal Mineralization Hypophosphatasia is a rare inherited skeletal dysplasia due to loss of function mutations in the ALPL gene. It is characterized by defective mineralization of bone and/or teeth in the presence of low activity of serum and bone alkaline phosphatase. Clinical features range from stillbirth without mineralized bone at the severe end to pathologic fractures of the lower extremities in later adulthood at the mild end. At least six clinical forms are currently recognized based on age at diagnosis and severity of features. The differential diagnosis of hypophosphatasia depends on the age at which the diagnosis is considered. In utero, osteogenesis imperfecta (OI) type II and campomelic dysplasia are the most common differential diagnoses. Rare conditions such as Stuve–Wiedemann syndrome may also be involved. At birth, OI type II, campomelic dysplasia, and chondrodysplasias with bone mineralization defect are very similar diseases and are challenging to differentiate radiographically. In infancy and childhood, different OI types are the most common differential diagnosis, but rarer disorders such as cleidocranial dysostosis, Cole-Carpenter syndrome, idiopathic juvenile osteoporosis, and renal osteodystrophy should be considered. In adulthood, osteopenia/osteoporosis and more rarely osteoarthritis and pseudogout may be caused by hypophosphatasia. Serum alkaline phosphatase activity can suggest the diagnosis pending confirmation with genetic testing. Hypophosphatemic rickets (HR) is a genetic disorder which prevents sufficient reabsorption of phosphate in the proximal renal tubule, with increased phosphate excretion, resulting in rickets. Rickets is a metabolic disorder of the growing bone which occurs in children before fusion of the epiphysis and is characterized by impaired mineralization of the osteoid matrix during growth. The most common form of HR is inherited in an X-linked manner, but the remaining 20% of familial HR patients belong to the autosomal dominant HR and to the hereditary HR with calciuria types. Availability 4 weeks Gene Set Description Genes in the Skeletal Dysplasia with Abnormal Mineralization Panel and their clinical significance Gene Associated phenotypes Inheritance ClinVar HGMD ALPL Odontohypophosphatasia, Hypophosphatasia perinatal lethal, infantile, AD/AR 78 291 juvenile and adult forms ANKH Calcium pyrophosphate deposition disease (familial chondrocalcinosis AD 13 20 type 2), Craniometaphyseal dysplasia autosomal dominant type B4GALT7 Ehlers-Danlos syndrome, progeroid form AR 8 9 CASR Hypocalcemia, Neonatal hyperparathyroidism, Familial Hypocalciuric AD/AR 104 396 hypercalcemia with transient Neonatal hyperparathyroidism CLCN5 Proteinuria, low molecular weight, with hypercalciuric nephrocalcinosis, XL 48 272 Hypophosphatemic rickets,, Nephrolithiasis, I, Dent disease COL1A1 Ehlers-Danlos syndrome, Caffey disease, Osteogenesis imperfecta type 1, AD 352 962 Osteogenesis imperfecta type 2, Osteogenesis imperfecta type 3, Osteogenesis imperfecta type 4 https://blueprintgenetics.com/ COL1A2 Ehlers-Danlos syndrome, cardiac valvular form, Osteogenesis imperfecta AD/AR 186 509 type 1, Osteogenesis imperfecta type 2, Osteogenesis imperfecta type 3, Osteogenesis imperfecta type 4 COL3A1 Ehlers-Danlos syndrome AD 520 631 COL5A1 Ehlers-Danlos syndrome AD 101 154 COL5A2 Ehlers-Danlos syndrome AD 24 35 CRTAP Osteogenesis imperfecta type 2, Osteogenesis imperfecta type 3, AR 12 30 Osteogenesis imperfecta type 4 CYP27B1 Vitamin D-dependent rickets AR 23 73 ENPP1 Arterial calcification, Hypophosphatemic rickets AD/AR 22 72 FBN1 MASS syndrome, Marfan syndrome, Acromicric dysplasia, Geleophysic AD 1465 2679 dysplasia 3 FGF23 Tumoral calcinosis, hyperphosphatemic, Hypophosphatemic rickets AD/AR 10 17 FKBP10 Bruck syndrome 1, Osteogenesis imperfecta, type XI AR 20 44 GALNT3 Tumoral calcinosis, hyperphosphatemic AR 17 35 MGP Keutel syndrome AR 5 8 P3H1 Osteogenesis imperfecta AR 18 63 PHEX Hypophosphatemic rickets XL 263 437 PLOD2 Bruck syndrome, Osteogenesis imperfecta type 3 AR 8 23 PLS3 Osteoporosis and osteoporotic fractures XL 1 17 PPIB Osteogenesis imperfecta type 2, Osteogenesis imperfecta type 3, AR 8 13 Osteogenesis imperfecta type 4 PTDSS1 Lenz-Majewski hyperostotic dwarfism AD 5 7 SERPINF1 Osteogenesis imperfecta, type VI AR 9 41 SGMS2 Osteoporosis and osteoporotic fractures, Skeletal dysplasia and disorders AD SLC34A3 Hypophosphatemic rickets with hypercalciuria AR 22 38 SLC39A13 Spondylodysplastic Ehlers-Danlos syndrome AR 2 9 SNX10 Osteopetrosis, autosomal recessive 8 AR 3 13 SOX9 Campomelic dysplasia, 46,XY sex reversal, Brachydactyly with anonychia AD 47 144 (Cooks syndrome) TNFRSF11A Familial expansile osteolysis, Paget disease of bone, Osteopetrosis, severe AD/AR 8 24 neonatal or infantile forms (OPTB1) TNFRSF11B Paget disease of bone, juvenile AR 8 18 VDR Vitamin D-dependent rickets AD/AR 17 66 https://blueprintgenetics.com/ XYLT2 Spondyloocular syndrome AR 2 10 *Some regions of the gene are duplicated in the genome. Read more. # The gene has suboptimal coverage (means <90% of the gene’s target nucleotides are covered at >20x with mapping quality score (MQ>20) reads), and/or the gene has exons listed under Test limitations section that are not included in the panel as they are not sufficiently covered with high quality sequence reads. The sensitivity to detect variants may be limited in genes marked with an asterisk (*) or number sign (#). Due to possible limitations these genes may not be available as single gene tests. Gene refers to the HGNC approved gene symbol; Inheritance refers to inheritance patterns such as autosomal dominant (AD), autosomal recessive (AR), mitochondrial (mi), X-linked (XL), X-linked dominant (XLD) and X-linked recessive (XLR); ClinVar refers to the number of variants in the gene classified as pathogenic or likely pathogenic in this database (ClinVar); HGMD refers to the number of variants with possible disease association in the gene listed in Human Gene Mutation Database (HGMD). The list of associated, gene specific phenotypes are generated from CGD or Mitomap databases. Non-coding disease causing variants covered by the panel Gene Genomic HGVS RefSeq RS-number location HG19 ALPL Chr1:21835920 c.-195C>T NM_000478.4 ALPL Chr1:21896764 c.793-30_793-11delGGCATGTGCTGACACAGCCC NM_000478.4 ANKH Chr5:14871567 c.-11C>T NM_054027.4 CASR Chr3:121994640 c.1378-19A>C NM_001178065.1 COL1A1 Chr17:48266910 c.2668-11T>G NM_000088.3 rs786205505 COL1A1 Chr17:48267594 c.2451+94G>T NM_000088.3 COL1A1 Chr17:48267611 c.2451+77C>T NM_000088.3 rs72651665 COL1A1 Chr17:48268147 c.2343+31T>A NM_000088.3 COL1A1 Chr17:48272201 c.1354-12G>A NM_000088.3 rs72648337 COL1A1 Chr17:48273368 c.1003-43_1003-32delTGCCATCTCTTC NM_000088.3 rs72645359 COL1A1 Chr17:48273574 c.958-18_958-15delTTCC NM_000088.3 rs72645351 COL1A1 Chr17:48273742 c.904-14G>A NM_000088.3 COL1A1 Chr17:48273743 c.904-15T>A NM_000088.3 COL1A2 Chr7:94025130 c.70+717A>G NM_000089.3 rs72656354 COL1A2 Chr7:94030856 c.226-22_226-11delTTTTTTTTTTTT NM_000089.3 COL3A1 Chr2:189872183 c.3256-43T>G NM_000090.3 rs587779667 COL5A1 Chr9:137645685 c.1720-11T>A NM_000093.4 rs863223444 COL5A1 Chr9:137680989 c.2647-12A>G NM_000093.4 COL5A1 Chr9:137686903 c.2701-25T>G NM_000093.4 rs765079080 COL5A1 Chr9:137726806 c.5137-11T>A NM_000093.4 rs183495554 COL5A2 Chr2:189927655 c.1924-11T>C NM_000393.3 https://blueprintgenetics.com/ CRTAP Chr3:33160815 c.472-1021C>G NM_006371.4 rs72659360 FBN1 Chr15:48707358 c.8051+375G>T NM_000138.4 FBN1 Chr15:48720682 c.6872-14A>G NM_000138.4 FBN1 Chr15:48721629 c.6872-961A>G NM_000138.4 FBN1 Chr15:48739106 c.5672-87A>G NM_000138.4 FBN1 Chr15:48739107 c.5672-88A>G NM_000138.4 FBN1 Chr15:48764885 c.4211-32_4211-13delGAAGAGTAACGTGTGTTTCT NM_000138.4 FBN1 Chr15:48786466 c.2678-15C>A NM_000138.4 FBN1 Chr15:48802380 c.1589-14A>G NM_000138.4 FBN1 Chr15:48818478 c.863-26C>T NM_000138.4 IFITM5 Chr11:299504 c.-14C>T NM_001025295.2 rs587776916 Explain PMID almost 23240094 all cases of OI type V PHEX ChrX:22076478 c.349+11149A>T NM_000444.4 PHEX ChrX:22113485 c.849+1268G>T NM_000444.4 PHEX ChrX:22237137 c.1701-16T>A NM_000444.4 PHEX ChrX:22237393 c.1768+177_1768+180dupGTAA NM_000444.4 PHEX ChrX:22266301 c.*231A>G NM_000444.4 PLS3 ChrX:114856534 c.74-24T>A NM_005032.5 SERPINF1 Chr17:1665408 c.-9+2dupT NM_002615.5 rs398122519 SERPINF1 Chr17:1674512 c.439+34C>T NM_002615.5 SERPINF1 Chr17:1675121 c.440-40_440-38delTCG NM_002615.5 rs775552455 SERPINF1 Chr17:1679209 c.787-617G>A NM_002615.5 SOX9 Chr17:70117348 c.-185G>A NM_000346.3 Test Strengths The strengths of this test include: CAP accredited laboratory CLIA-certified personnel performing clinical testing in a CLIA-certified laboratory Powerful sequencing technologies, advanced target enrichment methods and precision bioinformatics pipelines ensure superior analytical performance Careful construction of clinically effective and scientifically justified gene panels Some of the panels include the whole mitochondrial genome (please see the Panel Content section) Our Nucleus online portal providing transparent and easy access to quality and performance data at the patient level Our publicly available