Prevalence of Anterior Inferior Iliac Spine Dysmorphism and Development of a Novel Classification System: An Anatomic Study of 1,797 Cadaveric Specimens

Knapik, Derrick M.; Fortun, Chad M.; Schilf, Christopher R J; Nho, Shane J.; Salata, Michael J.

doi:10.3389/fsurg.2020.587921

Cited by 3 publications

(1 citation statement)

References 33 publications

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“…Recent anatomic data based on 1797 cadaveric specimens reported that AIIS dysmorphism was present in 6.4%. 20 This is lower than the current rate for patients undergoing hip arthroscopy.…”

Section: Discussionmentioning

confidence: 81%

Imaging Diagnosis, Prevalence, and Clinical Outcomes of Arthroscopic Surgery for Anterior Inferior Iliac Spine Impingement: A Systematic Review and Meta-analysis

Kobayashi

Kamono

Yamamoto

et al. 2022

Orthopaedic Journal of Sports Medicine

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Background: Subspine impingement, or anterior inferior iliac spine (AIIS) impingement, is a type of extra-articular pathology associated with femoroacetabular impingement syndrome and often requires subsequent arthroscopic surgery. Purpose: To examine the diagnostic accuracy, prevalence, and clinical outcomes of arthroscopic treatment for AIIS impingement. Study Design: Systematic review; Level of evidence, 4. Methods: The PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) 2020 checklist was applied. We searched for studies on the prevalence, diagnostic accuracy, and results of surgical treatment for AIIS impingement. For each included study, data synthesis and statistical analysis were performed to identify pooled prevalence, calculate clinical outcome scores, and estimate adverse events. The QUADAS (a quality assessment tool for diagnostic accuracy studies) was used to assess the quality of the diagnostic accuracy studies, and the Risk of Bias Assessment tool for Nonrandomized Studies was used to assess the quality of the studies on arthroscopic treatment efficacy. Results: Out of an initial 791 studies, 23 were included. AIIS impingement was diagnosed by plain radiography with 76% to 86% sensitivity, 3-dimensional computed tomography with 80% to 81.8% sensitivity, magnetic resonance imaging with 80% sensitivity, and ultrasound with 92.5% sensitivity. For patients who underwent hip arthroscopy, the pooled prevalence of AIIS impingement was 18%. Significant improvement between pre- and postoperative clinical outcomes was observed: 25.75 points for the modified Harris hip score (mHHS), 46.88 points for the Hip Outcome Score–Sport subscale, 20.85 points for the Nonarthritic Hip Score, and -2.92 points for the pain visual analog scale. The minimal clinically important difference on the mHHS was exceeded by 94% of patients. The pooled incidence of surgical complications was 1%. Of 6 included studies on diagnostic accuracy, 2 were identified as having a low risk of bias, and 4 included >2 factors with a high risk of bias. All 9 included studies on treatment outcomes had at least 1 factor with a high risk of bias. Conclusion: Several imaging modalities assist in the diagnosis of AIIS impingement. The overall prevalence of AIIS impingement in patients that underwent hip arthroscopy was 18%. Clinical outcomes after arthroscopic AIIS decompression were generally favorable, with a relatively low rate of surgical complications.

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“…Recent anatomic data based on 1797 cadaveric specimens reported that AIIS dysmorphism was present in 6.4%. 20 This is lower than the current rate for patients undergoing hip arthroscopy.…”

Section: Discussionmentioning

confidence: 81%

Imaging Diagnosis, Prevalence, and Clinical Outcomes of Arthroscopic Surgery for Anterior Inferior Iliac Spine Impingement: A Systematic Review and Meta-analysis

Kobayashi

Kamono

Yamamoto

et al. 2022

Orthopaedic Journal of Sports Medicine

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Ultrasound Assessment of Hip Subspine Bone Morphology Soft-tissue Correlates with Clinical Diagnosis of Impingement

Sun¹,

Liu²,

Tian³

et al. 2023

Arthroscopy: The Journal of Arthroscopic & Related Surgery

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Morphological Study of Anterior Inferior Iliac Spine in a Sample of Hemipelvis From South Indian Population

2024

Asian J Pharm Clin Res

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Objective: Abnormal morphology of anterior inferior iliac spine (AIIS) contributing to repeated femoroacetabular impingement, leading to functional limitation at the hip joint and chronic groin pain has been reported recently. The present study examines the prevalence of the morphologically different AIIS in south Indian population. Methods: This was an observational and cross-sectional study conducted by analyzing dry hemipelvises of South Indian population at the Department of Anatomy of a tertiary care teaching hospital between July 2022 and June 2023. The specimens were analyzed independently by first and second authors, to determine the prevalence of different morphologies of AIIS based on Morales-Avalos classification. Data were entered into Microsoft Excel and analyzed. Results: A total of 150 hemipelvises were analyzed. Type 2A was observed in 46.42% (n=65/140). Abnormal morphology was seen more on the left side hemipelvises (41.42%, n=58/140). Conclusions: Type 2A of AIIS was more prevalent in South Indian population and more prevalent on the left side hemipelvis. Demonstrating the different morphologies of AIIS helps in understanding their role in subspine hip impingement.

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Prevalence of Anterior Inferior Iliac Spine Dysmorphism and Development of a Novel Classification System: An Anatomic Study of 1,797 Cadaveric Specimens

Cited by 3 publications

References 33 publications

Imaging Diagnosis, Prevalence, and Clinical Outcomes of Arthroscopic Surgery for Anterior Inferior Iliac Spine Impingement: A Systematic Review and Meta-analysis

Imaging Diagnosis, Prevalence, and Clinical Outcomes of Arthroscopic Surgery for Anterior Inferior Iliac Spine Impingement: A Systematic Review and Meta-analysis

Ultrasound Assessment of Hip Subspine Bone Morphology Soft-tissue Correlates with Clinical Diagnosis of Impingement

Morphological Study of Anterior Inferior Iliac Spine in a Sample of Hemipelvis From South Indian Population

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