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Case report
Submitted: 2023-10-29
Accepted: 2024-01-01
Published online: 2024-04-03
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The double-headed accessory iliacus muscle: a case report

Marta Pośnik, Nicol Zielinska, Piotr Łabętowicz, Mariola Głowacka, Łukasz Olewnik
·
Pubmed: 38567939

open access

Ahead of Print
CASE REPORTS
Submitted: 2023-10-29
Accepted: 2024-01-01
Published online: 2024-04-03

Abstract

Purpose: Numerous accessory muscles are present in the human body, many of which are clinically significant. We present a case of an anomalous accessory iliacus composed of two heads, whose occurrence and anatomical location indicate a high probability of causing femoral nerve compression. Methods: During a routine dissection of the posterior abdominal wall of a xx-year-old cadaver, a double headed accessory muscle was noted, measured and photographed. Results: In addition to the normal anatomy of dissected structures from the posterior abdominal wall, an accessory iliacus muscle composed of superficial and deep heads was identified. In addition, the inferior roots of the divided femoral nerve located between the heads was found to follow an unusual course. Conclusions: It is important to be aware of morphological variability around structures such as double-headed accessory iliacus muscle presented in this study, due to their association with neurovascular bundles and hip joint. The reported atypical morphology is not widely known in the literature but might be of great clinical significance, therefore knowledge of such variability might be regarded in order to diagnose properly and introduce accurate treatment.

Abstract

Purpose: Numerous accessory muscles are present in the human body, many of which are clinically significant. We present a case of an anomalous accessory iliacus composed of two heads, whose occurrence and anatomical location indicate a high probability of causing femoral nerve compression. Methods: During a routine dissection of the posterior abdominal wall of a xx-year-old cadaver, a double headed accessory muscle was noted, measured and photographed. Results: In addition to the normal anatomy of dissected structures from the posterior abdominal wall, an accessory iliacus muscle composed of superficial and deep heads was identified. In addition, the inferior roots of the divided femoral nerve located between the heads was found to follow an unusual course. Conclusions: It is important to be aware of morphological variability around structures such as double-headed accessory iliacus muscle presented in this study, due to their association with neurovascular bundles and hip joint. The reported atypical morphology is not widely known in the literature but might be of great clinical significance, therefore knowledge of such variability might be regarded in order to diagnose properly and introduce accurate treatment.

Get Citation

Keywords

anatomical variations, accessory iliacus, femoral nerve compression

About this article
Title

The double-headed accessory iliacus muscle: a case report

Journal

Folia Morphologica

Issue

Ahead of Print

Article type

Case report

Published online

2024-04-03

Page views

61

Article views/downloads

35

DOI

10.5603/fm.98029

Pubmed

38567939

Keywords

anatomical variations
accessory iliacus
femoral nerve compression

Authors

Marta Pośnik
Nicol Zielinska
Piotr Łabętowicz
Mariola Głowacka
Łukasz Olewnik

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