Sedat Develi, Ahmet Yıldırım, Bülent Yalçın, Fatih Yazar

Aksesuar musculus piriformis

Piriformis kası os sacrum’un facies pelvica’sından başlar ve trochanter major’a insersiyo yapar. Kalçanın dış rotator kaslarından birisidir ve nervus ischiadicus kasın yakın komşuluğundan geçip uyluğa doğru seyrettiği için gluteal bölgede bir işaret noktasıdır. Bu komşuluk, piriformis sendromu olarak da bilinen sinirin irritasyonu ile ilişkili olabilir. Bu olguda, kasın 74 yaşındaki bir erkek kadavrada gözlenen nadir bir anatomik varyasyonu tartışılmıştır.

Accessory piriformis muscle

Piriformis muscle originates from facies pelvica of sacrum and inserts on the trochanter major. It is one of the lateral rotator muscles of the hip and a landmark point in the gluteal region since ischiadicus nerve descends to the thigh by passing close to the muscle. This contiguity may be associated with the irritation of the nerve which is known as piriformis syndrome. A rare anatomic variation of the muscle which observed on 74 years old male cadaver is discussed in this case report.

Keywords:

Piriformis kası, ekstra-spinal siyatik, piriformis kası sendromu,

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