The incidence of bilaterality in a dermoid cyst is approximately: (A) 10%, (B) 30%, (C) 50%, (D) 70%
Answer is A. Dermoid cyst is a benign germ cell tumour (very rarely malignant 1.7% typically in women older than 40 years). They are bilateral in 10% cases, usually unilocular with smooth surface, contains hair and sebaceousmaterial, lined in pa by squamous epithelium.