keyhole deformity

key·hole de·for·mi·ty

mucosal ectropion at the posterior edge of the anus following sphincterotomy at that location.
References in periodicals archive ?
It controls fine continence to gas, prevents slight mucus leakage and continuing damage leaves a keyhole deformity making the cleaning awkward.
Some rectal prolapse do need abdominal Operation-Prof. Robin Phillips
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