Methods: The piriformis muscle and sacral nerve roots were dissected through a peritoneal incision at the sacral promontory, followed by the identification and incision of the presacral fascia between the… Click to show full abstract
Methods: The piriformis muscle and sacral nerve roots were dissected through a peritoneal incision at the sacral promontory, followed by the identification and incision of the presacral fascia between the internal iliac vessels and hypogastric nerve on the right. The presacral space was developed, and the hypogastric fasciae opened. Notes were taken of any anatomical variations of the piriformis muscle in relation to the sacral foramina and sacral nerve roots.
               
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