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The concept of the sentinel lymph node is important because of the advent of the sentinel lymph node biopsy technique, also known as a sentinel node procedure. This technique is used in the staging of certain types of cancer to see if they have spread to any lymph nodes, since lymph node metastasis is one of the most important prognostic signs .
Donald Lee Morton (September 12, 1934 – January 10, 2014) was an American surgical oncologist who was best known for developing sentinel lymph node evaluation, a procedure that, by some estimates, saves the U.S. healthcare system nearly $4 billion annually in the treatment of melanoma and breast cancer. [1]
Melanoma metastasizes early into regional lymph nodes, so excision and analysis of so-called sentinel lymph nodes is important for treatment planning and prognosis assessment. To identify the sentinel lymph node for excision, a gamma-emitting radiotracer is injected inside the primary tumor and allowed to accumulate inside the sentinel lymph node.
See Lymphadenectomy#With sentinel node biopsy. However, Sentinel lymph node biopsy for evaluating early, thin melanoma has not been shown to improve survival, and for this reason, should not be performed. [1] Patients with melanoma in situ, T1a melanoma or T1b melanoma ≤ 0.5mm have a low risk of cancer spreading to lymph nodes and high 5-year ...
In the US, technetium (99m Tc) tilmanocept is indicated with or without scintigraphic imaging for lymphatic mapping using a handheld gamma counter to locate lymph nodes draining a primary tumor site in people with solid tumors for which this procedure is a component of intraoperative management; and guiding sentinel lymph node biopsy using a handheld gamma counter in people with clinically ...
The sentinel node market experienced high growth in the early and mid-1990s, starting with melanoma sentinel node surgical search and breast cancer sentinel node staging; both are currently considered standards of care. [4] The use of a radioactive tracer, rather than a coloured dye, was proposed in 1984. [5] [6]
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