Treatment of extragonadal germ cell tumour is –
**Core Concept**
Extragonadal germ cell tumors (EGGCTs) are a type of cancer that originates from germ cells, but outside the gonads. They are typically treated with chemotherapy, surgery, or radiation therapy, depending on the location and type of tumor.
**Why the Correct Answer is Right**
The primary treatment for EGGCTs is cisplatin-based chemotherapy, which targets rapidly dividing cancer cells. Cisplatin works by forming platinum-DNA adducts, leading to DNA damage and cell death. For non-seminomatous tumors, surgery may be necessary to remove the tumor, while for seminomatous tumors, radiation therapy can be effective. The combination of chemotherapy and surgery/radiation therapy has improved the prognosis for patients with EGGCTs.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because carboplatin is another platinum-based chemotherapy agent, but it is not the primary treatment for EGGCTs.
**Option B:** This option is incorrect because temozolomide is a chemotherapy agent used for glioblastoma, not EGGCTs.
**Option C:** This option is incorrect because radiation therapy is used in some cases, but it is not the primary treatment for EGGCTs.
**Clinical Pearl / High-Yield Fact**
The International Germ Cell Cancer Collaborative Group (IGCCCG) has developed a prognostic classification system for germ cell tumors, which helps guide treatment decisions. This system takes into account the primary tumor site, histology, and tumor markers.
**Correct Answer: A. Cisplatin-based chemotherapy.