Selecting Representative Tumour Bed Slices May Allow Reduced Embedding Without Loss of Accuracy in Response Evaluation to Neoadjuvant Immunotherapy in Stage IIIB/C Cutaneous Melanoma
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Le résumé fourni par la source
Background/Objectives: Histological assessment of the response to neoadjuvant immunotherapy in stage IIIB/C cutaneous melanoma is commonly performed using the INMC recommendations, which advocate embedding the entire tumour bed. However, this approach is highly resource-intensive. The original Swedish National Clinical Cancer Care Guidelines for Melanoma recommend a reduced embedding strategy, but its diagnostic performance in comparison with full embedding has not been systematically evaluated. We aimed to assess whether a reduced sampling approach based on selecting representative tumour bed slices provides comparable response classification to comprehensive embedding according to the INMC protocol. Methods: Ten consecutive patients with stage IIIB/C melanoma treated with neoadjuvant immunotherapy and subsequent lymph node dissection were included. All lymph node material was completely embedded, and the pathological response was evaluated using INMC criteria. Response classification based on the full embedding of the tumour bed was compared with reduced-sampling approaches that simulate the Swedish National Clinical Cancer Care Guidelines for Melanoma. Agreement between sampling methods was analyzed. Results: Targeted reduced sampling of two slices per lymph node demonstrated complete agreement with the full embedding for the INMC response category. Conclusions: In our study, a targeted reduced-embedding strategy focusing on slices with the largest area of tumour bed enables accurate histological assessment of response to neoadjuvant immunotherapy in stage IIIB/C melanoma while substantially reducing workload. These findings support the feasibility of targeted reduced embedding of instructions in the Swedish National Clinical Cancer Care Guidelines for Melanoma as an efficient alternative to full embedding of the lymphadenectomy specimens.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Selecting Representative Tumour Bed Slices May Allow Reduced Embedding Without Loss of Accuracy in Response Evaluation to Neoadjuvant Immunotherapy in Stage IIIB/C Cutaneous Melanoma
- Date Crossref
- 28/04/2026
- Éditeur
- MDPI AG
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Sahlgrenska University Hospital Department of Clinical Pathology pays non établi dans la noticeÉtablissement de santé
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University of Gothenburg Institute of Biomedicine pays non établi dans la noticeUniversité ou école supérieure
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Södra Älvsborg Hospital pays non établi dans la noticeÉtablissement de santé
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Linköping University Department of Biomedical and Clinical Sciences pays non établi dans la noticeUniversité ou école supérieure
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Linköping University Hospital pays non établi dans la noticeÉtablissement de santé
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Statisticon (Sweden) pays non établi dans la noticeEntreprise
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Department of Clinical Pathology Västra Götalandsregionen pays non établi dans la noticeÉtablissement de santé
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Statistikakademin AB pays non établi dans la noticeInstitution
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Sahlgrenska Academy and School of Public Health and Community Medicine pays non établi dans la noticeUniversité ou école supérieure
Department of Clinical Pathology — Sahlgrenska University Hospital, Institute of Biomedicine — University of Gothenburg et Södra Älvsborg Hospital, avec 6 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.