Testicular teratoma has all marker EXCEPT
**Core Concept**
Testicular teratoma, a type of germ cell tumor, is characterized by the presence of various tissue types, including ectodermal, endodermal, and mesodermal components. These tumors often express specific markers that aid in their diagnosis and differentiation from other testicular cancers.
**Why the Correct Answer is Right**
Testicular teratomas typically express markers such as alpha-fetoprotein (AFP), human chorionic gonadotropin (hCG), and lactate dehydrogenase (LDH). These markers are produced by the tumor cells and can be detected in the patient's serum. The expression of these markers is essential for the accurate diagnosis and management of testicular teratomas.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because AFP is a common marker expressed by testicular teratomas, particularly those with endodermal sinus tumor components.
* **Option B:** This option is incorrect because hCG is another marker often expressed by testicular teratomas, especially those with choriocarcinoma components.
* **Option C:** This option is incorrect because LDH is a marker that can be elevated in various testicular cancers, including teratomas, due to tumor cell lysis.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that the presence and levels of these markers can vary among patients with testicular teratomas. A high level of suspicion and a thorough clinical evaluation are necessary to accurately diagnose and manage these tumors.
**Correct Answer: A.**