I have long said that sentinel lymph node removal and testing in melanoma seems like a complete no-brainer to me!!! It is done when you return for the needed wide excision around the tumor that was removed. It is minimally invasive considering you're going to have the wide excision anyway. It is the only way to know what stage you really are. You may have only cutaneous disease and therefore are categorized as Stage 1 or 2....based on how thick your lesion was, the presence of ulceration, etc. BUT....if you have a positive node to go with that....you are then Stage 3....and that is a very different place to be.
1. It's important to know that's where you are in melanoma land.
2. It makes a world of difference in recommended follow up.
3. It makes a world of difference in what insurance companies will cover for your follow-up.
4. AND....it makes a world of difference in potential treatment options.
Here is a post from this year, with several links within, addressing risks for positive nodes in females specifically: Women and melanoma risk
NOW....do NOT confuse sentinel node removal and biopsy with a complete lymph node dissection (CLND). CLND is different. A CLND is when, usually after having one or more positive nodes, all the lymph nodes are removed from the nodal basin (the area in which the positive node was located). This IS invasive surgery and has the potential to cause nerve damage and or lymphedema, among other things. IF you had a positive sentinel node...this would be one of the things you would have to decide about doing or not. The science and data surrounding whether this is helpful or not, worth the potential damage or not, is murky. There are studies that say it helps and others that say is does not. BUT whichever way you decide to go with this...this is a decision made AFTER the sentinel node dissection and separate from it!!!
Now there is this:
The impact of sentinel node dissection on disease-free
and overall tumor-specific survival in melanoma patients: a single center group-matched
analysis of 1,192 patients. Geimer, Sattler, Flaig, et al. J Eur Acad Dermatol Venereol. 2016 Aug 24.
Sentinel lymph node
dissection (SLND) is considered a standard staging procedure providing important
prognostic information on melanoma patients. It remains a matter of debate,
whether SLND and hence removal of potential lymph node micrometastasis will
alter survival outcome.
The aim of this group-matched
analysis was to compare survival data of a large cohort of melanoma patients
who were treated by wide local excision only (WLE) and nodal observation (WLE
group) to a group of patients treated with WLE plus sentinel lymph node
dissection (SLND group) to investigate the potential therapeutic benefit of
SLND in the treatment of patients with melanoma.
A total of 596 consecutive patients who had undergone
WLE plus SLND between 1996 and 2003 were assessed. As a historical control group 596 patients
treated with WLE and nodal observation but without SLND between 1986 and 1995
were selected. The groups were
matched according to sex, age, Breslow tumor thickness and localization
of primary tumor. The adjuvant treatment and follow-up examinations were
performed according to protocols of the German Dermatologic Cooperative
Oncology Group (DeCOG) and applicable study protocols that our clinic
participated in and hence subject to change over time.
Kaplan-Meier
testing revealed significant differences in survival in favor of the SLND
group. Mean overall tumor specific survival (OS) was 102.7 months in the SLND
group vs. 97.0 months in the WLE group, respectively. Disease-free survival
(DFS) and time to lymph node progression also differed significantly between
the two groups.
SLND is not only an important
diagnostic procedure, but might also be of therapeutic benefit in terms of
disease-free and overall tumor-specific survival of melanoma patients.
See what I'm saying? Nothing in melanoma is easy. Absolute therapeutic effect of SLND may not be that impressive, though still a positive in this study, but SLND seems rather essential for diagnostic purposes. At least this part seems pretty clear to me. Good luck to all of you and whatever you decide. - les