A 38-year-old man arrived at our clinic with symptoms and investigation results (U.S. scan and MR) suggestive of acute calculous cholecystitis. He gave a past history of excision of a stage I melanoma of the shoulder. Metastatic disease was suspected following measurement of CA 19.9 levels and the CT scan. The patient underwent laparotomy and cholecystectomy; pathological examination confirmed the presence of a malignant melanoma metastatic lesion of the gallbladder.
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