NCIt definition : An autosomal recessive form of osteopetrosis caused by mutation(s) in at least 8 genes
related to osteoclast function. This condition is characterized by the failure of
osteoclasts to resorb bone, resulting in impaired bone modeling/remodeling, and skeletal
fragility despite increased bone mass; it is also associated with hematopoietic insufficiency,
hypocalcemia, disturbed tooth eruption, nerve entrapment syndromes, and growth impairment.
Some cases are also associated with progressive neurological deterioration.;