AbstractWe present a rare case of a 31‐year‐old woman with a mucinous ovarian tumor with sarcoma‐like mural nodules. The epithelial elements consisted of a mixture of benign, borderline‐malignant, and mucinous adenocarcinoma; the sarcoma‐like mural nodules consisted of pleomorphic and epulis‐like cells. The lesion was resected for an ovarian tumor. In an immunohistochemical study, these cells stained for lysozyme and vimentin. The patient received 2 courses of cisplatin (100 mg/m2). There was no evidence of disease at a second‐look laparotomy after 1 year, and none upon examination 6 years after the initial operation. The mural nodules might be of non‐epithelial origin. The prognosis of patients with this rare lesion appears favorable, according to this and p