Is it Necessary to Perform Sentinel Lymph Node Biopsy in Thin Melanoma? A Retrospective Single Center Analysis

A. Kocsis, L. Karsko, Zs Kurgyis, Zs Besenyi, L. Pavics, E. Dosa-Racz, E. Kis, E. Baltas, H. Ocsai, E. Varga, B. Bende, A. Varga, G. Mohos, I. Korom, J. Varga, L. Kemeny, I. B. Nemeth, J. Olah

Research output: Contribution to journalArticle

Abstract

Sentinel lymph node biopsy (SLNB) is a standard procedure for regional lymph node staging and still has the most important prognostic value for the outcome of patients with thin melanoma. In addition to ulceration, SLNB had to be considered even for a single mitotic figure in thin (<1 mm) melanoma according to AJCC7th guideline, therefore, a retrospective review was conducted involving 403 pT1 melanoma patients. Among them, 152 patients suffered from pT1b ulcerated or mitotic rate ≥ 1/ mm2 melanomas according to the AJCC7th staging system. SLNB was performed in 78 cases, of which nine (11.5%) showed SLN positivity. From them, interestingly, we found a relatively high positive sentinel rate (6/78–8%) in the case of thin primary melanomas ˂0.8 mm. Moreover, the presence of regression increased the probability of sentinel positivity by 5.796 fold. After reassessing pT stage based on the new AJCC8th, 37 pT1b cases were reordered into pT1a category. There was no significant relation between other characteristics examined (age, gender, Breslow, Clark level, and mitosis index) and sentinel node positivity. Based on our data, we suggest that mitotic rate alone is not a sufficiently powerful predictor of SLN status in thin melanomas. If strict histopathological definition criteria are applied, regression might be an additional adverse feature that aids in identifying T1 patients most likely to be SLN-positive. After reassessing of pT1b cases according to AJCC8th regression proved to be independent prognostic factor on sentinel lymph node positivity. Our results propose that sentinel lymph node biopsy might also be considered at patients with regressive thin (˂0.8 mm) melanomas.

Original languageEnglish
Pages (from-to)1861-1868
Number of pages8
JournalPathology and Oncology Research
Volume26
Issue number3
DOIs
Publication statusPublished - Jul 1 2020

Keywords

  • Melanoma
  • Mitotic rate
  • Regression
  • Sentinel lymph node biopsy
  • Stage

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Oncology
  • Cancer Research

Fingerprint Dive into the research topics of 'Is it Necessary to Perform Sentinel Lymph Node Biopsy in Thin Melanoma? A Retrospective Single Center Analysis'. Together they form a unique fingerprint.

  • Cite this

    Kocsis, A., Karsko, L., Kurgyis, Z., Besenyi, Z., Pavics, L., Dosa-Racz, E., Kis, E., Baltas, E., Ocsai, H., Varga, E., Bende, B., Varga, A., Mohos, G., Korom, I., Varga, J., Kemeny, L., Nemeth, I. B., & Olah, J. (2020). Is it Necessary to Perform Sentinel Lymph Node Biopsy in Thin Melanoma? A Retrospective Single Center Analysis. Pathology and Oncology Research, 26(3), 1861-1868. https://doi.org/10.1007/s12253-019-00769-z