obsolete_Thiemann disease, familial form true 3.41.0 Replaced with Mondo term. Osteochondritis of phalangeal epiphyses Thiemann disease is a very rare genetic necrotic bone disorder characterized clinically by painless swelling of the proximal interphalangeal joints associated with osteonecrosis of epiphyses followed by osteoarthritic changes, with onset before 25 years of age and often a benign course. orphanet Aseptic necrosis of phalangeal epiphyses OMIM:165700 Osteochondrosis of phalangeal epiphyses http://purl.obolibrary.org/obo/MONDO_0008142 ICD10:M93.2