Primary anorectal melanoma-a rare entity: case report.

Anorectal melanoma is a rare disorder. There have only been a few cases reported and there is no consensus of treatment. We report a case of 50-year-old Caucasian man presenting intermittent prolapse of an anorectal mass during 6 months with occasional bleeding.

[Acute acalculous cholecystitis: apropos of 6 cases].

Authors relate their experience of six cases of acute acalculous cholecystitis (4 postoperative, 2 posttraumatic and postoperative). Five cases were correctly diagnosed preoperatively and another case was operated on the basis of a high index of suspicion. Acute acalculous cholecystitis is often misdiagnosed and its frequency is probably higher than suspected.

Increased plasma motilin concentrations in small cell carcinoma of the lung.

Plasma samples from 21 patients with small cell carcinoma of the lung were screened for pancreatic polypeptide, somatostatin, motilin, and vasoactive intestinal polypeptide. One patient had severe impairment of both renal and liver function. In the 20 remaining subjects vasoactive intestinal polypeptide concentrations were normal, and only two patients had increased concentrations of somatostatin.