Which ovarian mass is typically bilateral and results from metastasis of gastric carcinoma?

• A. Krukenberg tumors
• B. Endometrioma
• C. Paraovarian cyst
• D. Hydrosalpinx

Answer: (A)

Krukenberg tumors are bilateral ovarian metastases most often arising from gastric carcinoma, especially diffuse-type adenocarcinoma with signet-ring cells. The bilateral involvement happens because tumor cells spread to both ovaries, so you see masses in both ovaries rather than a single unilateral lesion. Histology typically shows mucin-producing signet-ring cells, reflecting the gastric origin. The other options describe benign or non-ovarian conditions: endometrioma is a cyst from endometriosis and is usually unilateral; paraovarian cysts arise near the ovary but are separate from it; hydrosalpinx is a dilated fallopian tube, not an ovarian tumor.