We report a very rare case of a unilaterally absent piriformis muscle in a 60 year old woman. Accompanying variations comprised a common gluteal artery (instead of two distinct superior and inferior gluteal arteries), and an absent gemellus inferior muscle. The contralateral left side showed a normally developed piriformis muscle. In hominoids, the piriformis is constant, but is regularly missing in several other vertebrates. The piriformis muscle is an anatomical landmark for ultrasound investigations and ultrasound-guided interventions in the deep gluteal region such as a superior gluteal nerve block or even a sacral plexus block, also for any surgical approach such as total hip arthroplasty. A missing piriformis muscle therefore affects the orientation in the deep gluteal region and therefore the identification of the targeted structures.

Brenner E., Tripoli M., Scavo E., Cordova A. (2019). Case report: absence of the right piriformis muscle in a woman. SURGICAL AND RADIOLOGIC ANATOMY, 41, 845-848 [10.1007/s00276-018-02176-6].

Case report: absence of the right piriformis muscle in a woman

Tripoli M.;Scavo E.;Cordova A.
2019-01-01

Abstract

We report a very rare case of a unilaterally absent piriformis muscle in a 60 year old woman. Accompanying variations comprised a common gluteal artery (instead of two distinct superior and inferior gluteal arteries), and an absent gemellus inferior muscle. The contralateral left side showed a normally developed piriformis muscle. In hominoids, the piriformis is constant, but is regularly missing in several other vertebrates. The piriformis muscle is an anatomical landmark for ultrasound investigations and ultrasound-guided interventions in the deep gluteal region such as a superior gluteal nerve block or even a sacral plexus block, also for any surgical approach such as total hip arthroplasty. A missing piriformis muscle therefore affects the orientation in the deep gluteal region and therefore the identification of the targeted structures.
Settore MED/19 - Chirurgia Plastica
Brenner E., Tripoli M., Scavo E., Cordova A. (2019). Case report: absence of the right piriformis muscle in a woman. SURGICAL AND RADIOLOGIC ANATOMY, 41, 845-848 [10.1007/s00276-018-02176-6].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/412608
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