Introduction: Juvenile hyaline fibromatosis is a rare hereditary genetic disease characterized by a cutaneous tumoral fibroblastic proliferation with joint involvement.
Case-report: We report the case of 2 homozygous twin brothers both presenting a diffuse and invalidating form of juvenile hyaline fibromatosis. The 2 boys' born of a twin pregnancy' presented at the age of 2 months a clinical picture made up by the classic association: infiltrated papulo-nodules, gingival hyperplasia and joint contracture. The diagnosis of juvenile hyaline fibromatosis suggested clinically was confirmed by the histological study of the skin.
Discussion: These observations of juvenile hyaline fibromatosis's are particular in the involvement of 2 twin brothers, which to our knowledge has never been reported, the resemblance of the clinical features, and the severity of the functional handicap.