TP3.8 Postoperative Outcomes of Arthroscopic FAI Correction for Cam-Type Femoroacetabular Impingement With Pistol Grip Deformity

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ID: 331326
2026
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Abstract
Abstract Purpose Pistol grip deformity in cam-type femoroacetabular impingement (FAI) syndrome often extends laterally at the femoral head-neck junction, which can make arthroscopic osteochondroplasty technically challenging. However, postoperative outcomes following FAI correction in patients with pistol grip deformity have not been well reported. The purpose of this study was to investigate the postoperative outcomes of arthroscopic FAI correction in patients with pistol grip deformity. Methods Thirty-three hips that underwent arthroscopic cam osteochondroplasty for FAI syndrome with a minimum follow-up of 2 years were retrospectively reviewed. Patients were divided into two groups based on the presence of pistol grip deformity on preoperative anteroposterior radiographs of the hip: the pistol grip deformity group (PG group, 11 hips) and the control group without pistol grip deformity (C group, 22 hips). Sex, age at surgery, maximum α angle measured on radial CT preoperatively and postoperatively, and iHOT-12 scores preoperatively and at final follow-up were evaluated. Results All patients in the PG group were male, whereas the C group consisted of 9 male and 13 female hips; however, there was no significant difference in sex distribution between the groups. The mean age at surgery was significantly lower in the PG group than in the C group (33 [18–56] years vs. 40 [18–67] years, p < 0.01). The mean preoperative and postoperative α angles were significantly greater in the PG group than in the C group (62° [52–70] vs. 56° [51–65], p = 0.01; and 44° [35–49] vs. 39° [32–46], p = 0.01, respectively). However, no hips in the PG group showed a postoperative α angle greater than 50°. The mean preoperative and postoperative iHOT-12 scores were 44.7% (18.0–71.0) and 85.6% (41.0–100.0) in the PG group, and 36.7% (14.0–88.0) and 85.2% (53.0–100.0) in the C group, with no significant differences between the groups. Conclusion Although patients with pistol grip deformity demonstrated larger preoperative and postoperative α angles than those without deformity, satisfactory clinical outcomes were achieved after arthroscopic FAI correction. Adequate visualization of the lateral femoral head-neck junction is essential during osteochondroplasty for pistol grip deformity. In our institution, hip extension with traction is used to improve visualization during the procedure. Appropriate positioning and sufficient resection of the deformity may contribute to favorable postoperative outcomes.
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Authors Hitoshi Wakama, Hidetsugu Ohara, Shuhei Otsuki
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Journal Journal of hip preservation surgery
Year 2026
DOI
10.1093/jhps/hnag043.153
URL
https://doi.org/10.1093/jhps/hnag043.153
Keywords Keywords not found

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