Background: Cystic masses of the vulva are relatively uncommon. Such cysts can be vaginal, paraurethral, or clitoral; the most infrequent type of cyst is the clitoral cyst. Case: A 50-year-old multiparous female presented with a cystic mass of 15×6 cm over her clitoris. Complete excision of the cyst was perfomed without damaging the neurovascular bundle of the clitoris. The patient's histopathology report was consistent with a mesonephric cyst (a mucous cyst). Results: The patient's postoperative period was uneventful. No recurrence was noted 17 months later at a follow-up visit. Conclusions: Mucous (dysontogenetic) cysts are rare cases of clitoral cysts, compared to epidermoid cysts of the clitoris. Given that the gross appearance and symptoms of both of these cysts are not sufficiently characteristic, histopathologic examination is necessary for differentiation and confirmation of diagnosis. (J GYN SURG 31:58)
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