This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ovarian Tumors and Vulvar cancer, Subject name: Gynaecology & Obstetrics
In the cut section of ovary given below which is the ovarian tumour: 
Select and explain. 
A. Serous cyst adenoma, B. Dysgerminoma, C. Dermoid cyst, D. Mucinous cyst adenoma
C: Dermoid cyst
Answer: C: Dermoid cyst 
Explanation: Above image is of Dermoid cyst Dermoid cyst / Benign cystic teratoma All 3 germ cell layers present ( bone, teeth,sebaceous secretions, hair, endocrine glands) Endoderm Mesoderm Ectoderm 10-15% are bilateral Can have malignant transformation -Sq cell carcinoma Most common ovarian tumors in pregnancy Most common ovarian tumors to undergo torsion.