Mesenteric fibromatosis with ureteric stenosis.

We report a case of a 37 year old man who presented with vomiting and colicky abdominal pain and who was found to have microscopic haematuria. Radiological-examination showed a right hydronephrosis apparently caused by a paracaecal tumour extending to involve the right ureter. This was resected and proved histologically to be a mesenteric fibromatosis. The patient has none of the factors predisposing to the development of this lesion, in particular Gardner's syndrome. Eight months following surgery he appears to have made a full recovery. Previous publications on this rare intra-abdominal neoplasm are reviewed.