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Jansen's metaphyseal chondrodysplasia (JMC) is a disease that results from ligand-independent activation of the type 1 of the parathyroid hormone receptor, due to one of three reported mutations (activating mutation). [1] JMC is extremely rare, and as of 2007 there are fewer than 20 reported cases worldwide.
Metaphyseal dysplasia, or Pyle disease, [3] is a disorder of the bones. It is a rare disease in which the outer part of the shafts of long bones is thinner than normal and there is an increased chance of fractures .
Hereditary multiple osteochondromas (HMO), also known as hereditary multiple exostoses, is a disorder characterized by the development of multiple benign osteocartilaginous masses in relation to the ends of long bones of the lower limbs such as the femurs and tibias and of the upper limbs such as the humeri and forearm bones.
Metaphyseal tumors or lesions include osteosarcoma, chondrosarcoma, fibrosarcoma, osteoblastoma, enchondroma, fibrous dysplasia, simple bone cyst, aneurysmal bone cyst, non-ossifying fibroma, and osteoid osteoma. [5] One of the clinical signs of rickets that doctors look for is cupping and fraying at the metaphyses when seen on X-ray.
Metaphyseal chondrodysplasia Schmid type is a type of chondrodysplasia associated with a deficiency of collagen, type X, alpha 1. [2] [3] [4]Unlike other "rickets syndromes", affected individuals have normal serum calcium, phosphorus, and urinary amino acid levels.
Verloes Van Maldergem Marneffe syndrome, also known as microspherophakia-metaphyseal dysplasia is a very rare genetic disorder which is characterized by flattened and deformed vertebrae, developmental delay, dysplasia of the epiphyses and metaphyses, lens coloboma and dislocation, microspherophakia, nearsightedness, retinal detachment, and spinal stenosis.
Ghosal hematodiaphyseal dysplasia, is a rare, autosomal recessive disease, characterized by diaphyseal dysplasia and metaphyseal dysplasia of the long bones and refractory anemia. [ 2 ] [ 3 ] [ 1 ] It is associated with a deficiency of Thromboxane-A synthase , [ 4 ] which produces Thromboxane A2 .
Date/Time Thumbnail Dimensions User Comment; current: 23:32, 17 February 2023: 848 × 1,383 (509 KB): Ted Shackelford: Uploaded a work by Sydney S. Gellis and Murray Feingold from Atlas of mental retardation syndromes; visual diagnosis of facies and physical findings with UploadWizard