You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Local excision in CA rectum is done in all, except: and explain in detail?
Ans. (d) T1 and T2 cancer with or without lymph node involvementRef: Sabiston 19th Edition, Pages 1356-1360Transanal excision of cancer rectum* T1N0 or T2N0 lesion <4cm in diameter* <40% circumference of the lumen* <10cm from dentate line* Well to moderately differentiated histology* No evidence of lymphatic or vascular invasion on biopsyOn Endo USG:* T1 and T2 lesions without nodes will be opted for Transanal excision