Juvenile hyaline fibromatosis]

Background. Juvenile hyaline fibromatosis and infantile systemic hyalinosis are two rare autosomal recessive diseases arising from mutation in the capillary morphogenesis factor-2 gene. They are characterized by accumulation of hyaline material, in the skin in the first instance and in other organs in the second. We describe a case of juvenile hyaline fibromatosis. Case report. A 2-year-old girl presented gingival hyperplasia, skin papules, subcutaneous nodules and joints and bones lesion. A diagnosis of juvenile hyaline fibromatosis was suggested and this was confirmed by histopathology and genetic analyses. The patient presented frequent episodes of diarrhoea, which is evocative of infantile systemic hyalinosis. Discussion. This case clearly illustrates the wide phenotypic range of juvenile hyaline fibromatosis. Diagnosis must be made as soon as possible to avoid cosmetic and functional handicap. (C) 2010 Elsevier Masson SAS. All rights reserved.