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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
During incision & drainage of ischiorectal abscess, which nerve is/are affected/injured :
assistant
The correct answer is  Ans: B (Inferior rectal nerve) Fig: Coronal section through the ischiorectal fossa"Ilioinguinal nerve, supply the skin of external genitalia & upper part of the medial side of the thigh"- BDC4th/Vol. II 196Ischioanal Fossa (formerly called ischiorectal fossa)It is somewhat prismatic in shape, with its base directed to the surface of the perineum, and its apex at the line of meeting of the obturator and anal fasciae.Contents of the Ischiorectal fossaIschiorectal pad of fatInferior rectal nerve and vessels.Posterior scrotal / posterior labial nerve and vessels.Pudendal canal and its contentsfpudendal nerve & internal pudendal vessel)Perineal branch of fourth sacral nerve.Perforating cutaneous branch ofS2, S3 nerve