The absence of piriformis muscle, combined muscular fusion, and neurovascular variation in the gluteal region

Leal, Matheus Coelho; Alexander, João Gabriel; Beber, Eduardo Henrique; Baptista, Josemberg da Silva

doi:10.4322/acr.2020.239

Cited by 2 publications

(3 citation statements)

References 10 publications

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“…Moreover, inflammation of the piriformis under these variant conditions can lead to myositis ossificans and myofascial syndrome, illustrating the importance of understanding the different variants of the muscle [15,16]. The absence of the piriformis muscle has been described by authors such as Brenner et al and Leal et al [17,18]. Lastly, the piriformis has been reported to have rarely, two heads with possible attachments to the sacrotuberous ligament, sacrum, or ilium, and recently, in a single case report, three heads but without splitting of the sciatic nerve such as was identified in the case presented herein [19].…”

Section: Discussionmentioning

confidence: 99%

A Three-Headed Piriformis Muscle With Splitting of the Common Fibular Nerve

Akamefula¹,

Chaiyamoon²,

Anadkat³

et al. 2023

Cureus

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Although the division of the piriformis muscle by the sciatic nerve or its branches is fairly common, other anatomical variations of this muscle are relatively uncommon. Here, we present a cadaveric case found to have an atypical composition of the piriformis muscle. During the routine dissection of the right gluteal region in an adult male cadaver, an unusual finding of the piriformis muscle was observed. Three distinct heads of the muscle were identified. In addition, one of these heads split the common fibular nerve. The anatomy and relationships of this case are presented here. Any variation in neurovasculature and musculature can be relevant for diagnosing or surgically intervening in the gluteal region. The present case is apparently unique and of archival value.

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Section: Discussionmentioning

confidence: 99%

A Three-Headed Piriformis Muscle With Splitting of the Common Fibular Nerve

Akamefula¹,

Chaiyamoon²,

Anadkat³

et al. 2023

Cureus

View full text Add to dashboard Cite

show abstract

“…For example, the GI can be fused with the QF. Leal et al [12] also described fusion between the GS and the gluteus minimus. Charpy and Nicolas [5] found a muscular connection between the QF and the GI, and between the QF and the adductor magnus [5].…”

Section: Case Reportmentioning

confidence: 96%

“…These muscles can be also doubled [15]. Cases have been reported in which the GS is fused with the PM or gluteus minimus, or the GI is fused with the QF [12]. The OI is not as variable, though it can be divided into two distinct parts [9].…”

Section: Introductionmentioning

confidence: 99%