A 30-year-old woman undergoes laparoscopy for a 7 cm unilateral unilocular ovarian cyst. Histology shows a cyst lined by a single layer of cuboidal to columnar ciliated epithelium overlying a fibrous stroma. What is the diagnosis?
- A Mucinous cystadenoma
- B Serous cystadenoma ✓
- C Endometriotic cyst
- D Follicular cyst
Correct answer: B. Serous cystadenoma
Explanation
Serous cystadenoma is the most common benign epithelial ovarian tumour. It is typically unilocular, lined by ciliated cuboidal or columnar epithelium resembling fallopian tube epithelium, and contains clear serous fluid. Mucinous cystadenoma is multilocular with goblet-like mucin-secreting cells, and follicular cysts are functional lesions lacking this epithelial lining pattern.
Reference: Robbins and Cotran Pathologic Basis of Disease, 10th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.