What question did this study set out to answer?

To present a case of intra-articular osteoid osteoma misdiagnosed as femoroacetabular impingement.

May 16, 2026Open Access

Atypical Hip Pain due to Intra-articular Osteoid Osteoma Treated by Surgical Hip Dislocation in an Adolescent: Case Report

MMMario Martínez-VillalobosShriners Hospitals for Children - Mexico YCYurik Clemente-AscencioCentro Médico ABC ERErnesto Roldán-ValadezSechenov University

Key Points

To present a case of intra-articular osteoid osteoma misdiagnosed as femoroacetabular impingement.
15-year-old girl with 2 years of groin pain underwent imaging revealing intra-articular OO.
Surgical hip dislocation was performed to excise the nidus at the femoral head-neck junction.
Follow-up assessment was conducted 2 years post-surgery.
Patient was pain-free at 2-year follow-up with a full range of motion.
No signs of femoroacetabular impingement were observed after surgery.

Abstract

Introduction: Intra-articular osteoid osteoma (OO) of the hip often presents with atypical symptoms and may mimic femoroacetabular impingement, leading to delayed diagnosis. Case Report: A 15-year-old girl presented with 2 years of right groin pain and restricted hip motion. Imaging revealed an intra-articular OO at the femoral head-neck junction. Surgical hip dislocation allowed complete excision of the nidus and restoration of the femoral head-neck offset. At 2-year follow-up, the patient was pain free with a full range of motion and no signs of impingement. Conclusion: Surgical hip dislocation provides full access to the femoral head-neck junction and enables safe, complete resection of intra-articular OO in adolescents.

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