Stage- II testicular teratoma is treated by-

• Most common testicular tumor in prepubertal adults: Teratoma • Tumor is composed of two or more embryonic germ cell layers that may be both mature and immature. • Tumor is very heterogeneous with both solid and cystic components. Teratoma is divided into three subsets 1. Mature: well-differentiated ectodermal, mesodermal, or endodermal tissues 2. Immature: incompletely differentiated tissues 3. Teratoma with areas of malignant transformation: sarcoma, squamous carcinoma, adenocarcinoma • Teratomas are potentially malignant Clinical Features • Age range: first, second, and third decades. • Mature and immature forms have metastatic potential in adults but in children are uniformly benign. • The primary tumor generally presents as an enlarged testis with both solid and cystic components. • The teratoma component of metastatic GCT is resistant to chemotherapy and radiotherapy. Tumor Markers • AFP is raised in 20-25%