Vulva! carcinoma metastasizes to which lymph group :
**Core Concept**
The lymphatic drainage of the vulva plays a crucial role in the spread of carcinoma. The vulva receives lymphatic drainage from multiple sources, including the labia majora, labia minora, clitoris, and vestibular bulb. This complex network of lymphatic vessels ultimately drains into different lymph node groups.
**Why the Correct Answer is Right**
The correct lymph node group for vulvar carcinoma metastasis is the inguinal lymph nodes. The inguinal lymph nodes are located in the groin area and receive lymphatic drainage from the lower extremities, external genitalia, and perineal region. The lymphatic vessels from the vulva drain into the superficial and deep inguinal lymph nodes, which are the primary sites for metastasis.
* The superficial inguinal lymph nodes are located along the course of the great saphenous vein and receive lymphatic drainage from the labia majora and the skin of the vulva.
* The deep inguinal lymph nodes are located along the course of the femoral vein and receive lymphatic drainage from the labia minora, clitoris, and vestibular bulb.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not specify the correct lymph node group for vulvar carcinoma metastasis.
* **Option B:** This option is incorrect because it refers to the iliac lymph nodes, which are involved in the drainage of the pelvic organs but not the primary site for vulvar carcinoma metastasis.
* **Option C:** This option is incorrect because it refers to the axillary lymph nodes, which are involved in the drainage of the breast and upper extremities but not the vulva.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that the lymphatic drainage of the vulva is complex, and metastasis can occur to both the superficial and deep inguinal lymph nodes. A thorough knowledge of the lymphatic drainage of the vulva is crucial for accurate staging and treatment planning of vulvar carcinoma.
**Correct Answer:** C. Inguinal lymph nodes.