Imaging findings in mucin-producing carcinoma of the gallbladder.

Mucin-producing carcinoma of the gallbladder is rare, and its imaging features have not been well documented. Its symptoms and signs are nonspecific and the prognosis of the disease is poor. We present a 73-year-old male with mucin-producing carcinoma of the gallbladder, emphasizing its imaging features on ultrasound, computed tomography and magnetic resonance imaging. The tumor usually presents as a cauliflower-like soft tissue mass with small calcified spots in the gallbladder wall and some laminated high viscosity fluid inside the gallbladder cavity. Recognition of these features can provide clues to the diagnosis of mucin-producing carcinoma of the gallbladder.