Mondo Description Pycnodysostosis is a genetic lysosomal disease characterized by short stature, increased density of the bones (osteosclerosis/osteopetrosis), and brittle bones. Other features may include underdevelopment of the tips of the fingers with absent or small nails, an abnormal collarbone (clavicle), distinctive facial features including a large head with a small face and chin, underdeveloped facial bones, a high forehead, and dental abnormalities.Pycnodysostosis is an autosomal recessive condition caused by mutations in the gene that codes the enzyme cathepsin K (CTSK) on chromosome 1q21. The diagnosis of pycnodysostosis is based on physical features and X-ray findings. Molecular genetic testing is available. Treatment should address the symptoms found in each patient and may include orthopedic monitoring, treatment of fractures, appropriate dental care, and craniofacial surgery.
Uniprot Description A rare autosomal recessive bone disorder characterized by deformity of the skull, maxilla and phalanges, osteosclerosis, and fragility of bone.
Disease Ontology Description An osteochondrodysplasia that has_material_basis_in a mutation in the CTSK gene which results_in dwarfism, brittle bones, osteopetrosis, shortening of the distal phalanges.
Counts of Target Development Levels for diseases known to be associated with this disease. If the disease has a valid DOID, targets known to be associated with all child diseases are aggregated. Click "Explore Associated Targets" to view more facets and details for the target list.
This disease has been annotated by GARD as a rare disease.
Description from Mondo Disease Ontology.
Description from UniProt.
Description from Disease Ontology
DataSources which have contributed target associations to this disease, and the identifiers by which the disease is referenced.
DOID:0080038
GARD:0004611
MESH:D058631
NCIT:C131187
OMIM:265800
Orphanet:763
SCTID:89647000
UMLS:C0238402
MONDO:0009940
High level summary of knowledge for a disease, including descriptions and datasource references.