A case of a borderline mucinous tumor of the ovary with sarcoma-like mural nodules producing granulocyte colony-stimulating factor

Borderline ovarian tumor with sarcoma-like mural nodule is rare. Malignant mural nodules usually occur in the wall of an atypical proliferative mucinous tumor or a mucinous carcinoma. The authors report one case of unfavorably progressive borderline tumor of the ovary with sarcoma-like mural nodule that produced granulocyte colony-stimulating factor (G-CSF).