Treatment of early anal margin cancer, stage cT1N0M0
Clinical scenario
This protocol applies to patients with early anal margin cancer staged as cT1N0M0 — a localised, node-negative presentation that is amenable to a definitive surgical approach without systemic or radiation-based treatment.
Condition
Early anal margin cancers at stage cT1N0M0 represent a sub-group in which local excision can be used as the primary and definitive intervention. Preservation of sphincter function is a key consideration in planning.
Treatment approach & goal
Management centres on a local surgical excision of the anal margin tumour. The overriding clinical goal is achieving a histological clearance margin of >1 mm without damage to the anal sphincter muscle.
The complete surgical technique, margin requirements, and decision algorithm are detailed in the full structured protocol below.
References
DOI: 10.1016/j.annonc.2021.06.015
- Early anal margin cancers (cT1N0M0) can be treated definitively by local excision.
- The majority of these are early anal margin cancers (cT1N0M0).
- Early anal margin cancers (cT1N0M0) can be treated definitively by local excision. The aim of this operation is to achieve a histological clearance of >1 mm without damage to the anal sphincter muscle [IV, C].
- This commonly requires a macroscopic surgical clearance of 0.5‑1.0 cm.
- The aim of this operation is to achieve a histological clearance of >1 mm without damage to the anal sphincter muscle [IV, C].
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