Question

which of the following is the benign tumor of the ovary that may contain fully differentiated elements from all three germ cell layers such as hair and teeth?

fibrothecoma
immature teratoma
cystadenoma
mature teratoma
cystadenocarcinoma

Explanation:

To determine the correct answer, we analyze each option:

• Fibrothecoma: A stromal tumor, doesn't contain elements from all three germ layers.
• Immature teratoma: Malignant, has immature tissue, not fully differentiated.
• Cystadenoma: Epithelial tumor, no germ - layer - derived differentiated elements like hair/teeth.
• Mature teratoma: Benign ovarian tumor, contains fully differentiated tissues from all three germ layers (ectoderm, mesoderm, endoderm), including hair, teeth, etc.
• Cystadenocarcinoma: Malignant epithelial tumor, no such differentiated elements.

Answer:

D. Mature teratoma