Mixed Neuroendocrine—Non‐Neuroendocrine Neoplasm ( MiNEN ) of the Gallbladder. A Case Report From a Low‐Resource Setting

ABSTRACT Mixed neuroendocrine–non‐neuroendocrine neoplasms (MiNENs) of the gallbladder are exceedingly rare entities. We report a case of a 35‐year‐old female with a palpable right hypochondrial mass. Imaging demonstrated a large polypoid gallbladder lesion with periportal lymphadenopathy. The patient underwent open cholecystectomy with lymphadenectomy. Histopathology and immunohistochemistry revealed a MiNEN. At 12‐month follow‐up, she remained free of recurrence without any adjuvant chemotherapy.