HyperostosisHyperostosis is an excessive growth of bone. It may lead to exostosis. It occurs in many musculoskeletal disorders and from use of drugs like Isotretinoin.Disorders featuring hyperostosis include: Camurati-Engelmann disease, type 2 Hypertrophic osteoarthropathy, primary, autosomal recessive, 2 Melorheostosis Tumoral calcinosis, hyperphosphatemic, familial, 1 Worth disease