Anal canal carcinoma: Early-stage tumors ≤10 mm (T1 or Tis): Therapeutic options and original pattern of local failure after radiotherapy

Conclusion: Most recurrences occurred after a long disease-free interval after treatment and often outside the initial tumor site. These small anal cancers could be treated by RT using a small volume and moderate dose (40-50 Gy for subclinical lesions and 50-60 Gy for T1).