We report the case of a 30-year-old woman, consulting for a painful clitoromegaly which developed progressively and rapidly. The gyneco-endocrinological assessment ruled out hyperandrogenism. Ultrasound examination of the clitoris revealed the presence of a clitoral cyst. Acquired clitoromegaly is a symptom which occurs in severe hyperandrogenism. Other organic etiologies include clitoral cysts of various nature and solid tumors. An ultrasonographic examination should be included in the diagnostic work-up for acquired clitoromegaly.