Intraoperative sentinel lymph node detection in axilla is done by using –
**Core Concept**
Intraoperative sentinel lymph node detection is a technique used to identify the first lymph node to which cancer cells are likely to spread from a primary tumor. This concept is crucial in cancer staging and treatment planning. The sentinel lymph node is often located in the axilla for breast cancer.
**Why the Correct Answer is Right**
The correct answer is a technique using a radioactive tracer, typically technetium-99m sulfur colloid, which is injected into the tumor site. The tracer accumulates in the sentinel lymph node, allowing surgeons to identify and remove it for histopathological examination. This method helps determine whether the cancer has spread to the lymph nodes, guiding further treatment.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not correct because it does not specifically describe a method for intraoperative sentinel lymph node detection. While it may be related to cancer treatment, it is not the correct answer.
**Option B:** This option is not correct because it is a type of imaging modality, not a technique for intraoperative sentinel lymph node detection. Although imaging can be used to identify sentinel lymph nodes preoperatively, it is not the correct answer for intraoperative detection.
**Option C:** This option is not correct because it is a type of surgical procedure, not a method for identifying sentinel lymph nodes. While axillary dissection may involve the removal of sentinel lymph nodes, it is not the correct answer for intraoperative detection.
**Clinical Pearl / High-Yield Fact**
It is essential to remember that sentinel lymph node biopsy is a minimally invasive procedure that can reduce the morbidity associated with axillary lymph node dissection. This technique has become a standard approach in breast cancer surgery, allowing for more accurate staging and treatment planning.
**Correct Answer: C. Isosulfan blue dye.**