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Updated: Aug 25, 2026
Comparison of Predictive Performance of Three Lymph Node Staging Systems in Colorectal Signet Ring Cell Carcinoma Based on Machine Learning Model
Published on: April 18, 2025
Refined staging by sentinel lymph node biopsy to individualize therapy in anal cancer
Christoph Ulmer1, Andreas Bembenek, Stephan Gretschel
1Department of Surgery and Surgical Oncology, University Hospital Charité, Campus Buch, Robert Roessle Klinik at the Helios Klinikum, Berlin, Germany.
Abstract:
We evaluated the feasibility of the sentinel lymph node technique to refine staging and potentially individualize therapy for anal cancer. Seventeen patients with cancer of the anal canal underwent peritumoral injection of 99mTc-colloid, followed 17 hours later by lymphoscintigraphy. A selective lymph node biopsy (SLNB) was attempted in 12 of 13 cases with scintigraphically detected SLNs. Lymph node metastases were present in 5 of 12 cases (42%); in 2 of these 5 cases, micrometastases were detected only by immunohistochemical staining. Hence, SLNB refines the diagnostic workup for anal cancer and provides an accurate basis for individualized therapy.
