Gallbladder Adenomyomatosis Presenting With Abdominal Pain

A previously well 50-year-old male presented with a six-year history of worsening right-sided upper abdominal pain, postprandial nausea, and early satiety. His blood tests, including full blood count, liver biochemistry, and serum amylase, were normal. CT of the abdomen with intravenous contrast demonstrated concentric segmental mural thickening of the body and fundus of the gallbladder, with intramural cystic foci (rosary sign). MRI of the abdomen demonstrated segmental gallbladder mural thickening with fluid-filled intramural diverticula (pearl necklace sign) and an hourglass configuration of the gallbladder, consistent with segmental gallbladder adenomyomatosis. The patient subsequently underwent laparoscopic cholecystectomy with histological confirmation of gallbladder adenomyomatosis, without evidence of malignancy. His postoperative recovery was uneventful.