Colonic hamartomatous polyposis associated with hypertrophic osteoarthropathy.

A 7-year-old girl with an unremarkable family history was admitted with complaints of diarrhea containing mucus and blood, abdominal pain, weight loss and fever for 10 months. Although her symptoms, physical examination and laboratory results were highly suggestive of inflammatory bowel disease, radiologic studies and colonoscopy demonstrated multiple colonic polyps. A bilateral and symmetric lamellar periosteal reaction and osteopenia were present on her extremity radiographs. The chest radiograph and thoracic CT scan were normal. The histologic nature of the polyps was determined as hamartoma. One month after subtotal colectomy, the patient's symptoms resolved and she gained 7 kg in weight. The association of generalized juvenile polyposis and hypertrophic osteoarthropathy has previously been described in five cases; arteriovenous malformations were present in four of them. In our case the polyps were hamartomatous and localized in the colon, without associated arteriovenous malformation.