Novel application of internal obturator and semitendinosus muscle flaps for rectal wall repair or reinforcement

Internal obturator and/or semitendinosus muscle flaps were utilised for a novel indication to reinforce primary appositional rectal wall repair in three dogs and one cat in this case series. All three dogs in this study incurred rectal wall compromise during surgical excision of anal sac tumours. The cat sustained bite wounds to the perianal region resulting in abscessation and a rectal tear. Perioperative complications and short-term outcome are described as detailed in the patient records. Additional follow up was obtained by telephone interview with the referring veterinary surgeon or the owner and the technique was successful in all cases. The application of an internal obturator and/or semitendinosus muscle flap has the potential to reduce the risk of rectal wall dehiscence after primary repair, and consequently the risk of pararectal abscess or recto-cutaneous fistula formation.