History: 50 year old female with melanoma.
This is a case of metastatic malignant melanoma to the gallbladder. Melanoma is the most common cancer to metastasize to the gallbladder, and it usually occurs in the setting of widespread metastatic disease. Melanoma metastases are usually hyperenhancing. The differential diagnosis in this case would include other causes of gallbladder wall thickening. These include benign gallbladder polyps, adenomyomatosis, polypoid gallbladder carcinoma, and possibly tumefactive sludge.
Treatment for solitary gallbladder metastasis of melanoma is surgical excision; however, these patients have a poor prognosis.