Hyperostosis

Hyperostosis is an excessive growth of bone. It may lead to exostosis. It occurs in many musculoskeletal disorders.

It is the thickening of the cortical bone.

Hyperphosphatemia-hyperostosis syndrome (HHS) is a rare autosomal recessive metabolic disorder characterized by elevated serum phosphate levels and radiological evidence of cortical hyperostosis. HHS is caused by mutations in GALNT3.

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