Microscopically, a borderline serous cystadenoma is seen here with papillary projections of epithelium extending into the lumen of the tumor. There is no invasion of the stroma or capsule.

• 显微镜下可见卵巢交界性浆液性囊腺瘤的上皮向肿瘤腔内伸展,但没有侵袭到基质或囊壁。