[Juvenile fibromatosis with isolated intra-abdominal form. Apropos of 2 cases].

Among infantile fibromatosis, isolated intra-abdominal forms are the most unusual. The authors report two cases, a hepatic fibromatosis in an eleven year old girl, and a desmoïd tumor located in the jejunal mesentery in a ten month old infant. Pre-operative diagnosis is very difficult and histologic findings show a benign fibroblastic proliferation that tends to infiltrate surrounding tissues and often recur after surgical excision.