Benign epithelial tumors of the ovary can reach massive proportions. The serous cystadenoma seen here fills a surgical pan and dwarfs the 4 cm ruler.

• 良性卵巢上皮瘤可以明显增大。图示的浆液囊腺瘤充满了外科手术盘,图上可以看到4cm的直尺显得太小了。