Osteoid Osteoma of the Joint Capsule: A Case Report Highlighting Diagnostic Challenges and the Role of Advanced Imaging

Authors

Nadeer M. Gharaibeh Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, China
Hissein M. Fadoul Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, China
Areej H. Al-Sarairah Diagnostic Imaging and Radiotherapy Program, Faculty of Health Sciences, School of Diagnostic and Applied Health Sciences, Universiti Kebangsaan Malaysia, Malaysia/Department of Radiology, Princess Aisha Bint Al Hussein College of Nursing and Health Sciences, Al Hussein Bin Talal University, Jordan
Gang Wu Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, China
Xiaoming Li Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, China

DOI:

Abstract

BACKGROUND: Osteoid osteoma is a benign osteogenic tumor typically affecting cortical bone and often mimicking musculoskeletal conditions. This report describes a rare intra-articular osteoid osteoma within the hip joint capsule, highlighting diagnostic challenges and the role of multimodal imaging.

A 13-year-old male presented with a one-year history of persistent proximal left femoral pain, most severe at night, disrupting sleep. Initial computed tomography revealed a lesion extending from the proximal femoral cortex into the medullary cavity and quadratus femoris muscle, while contrast-enhanced magnetic resonance imaging confirmed an intra-capsular nidus. Surgical resection identified woven bone, confirming the diagnosis. This case demonstrates that computed tomography and contrast-enhanced magnetic resonance imaging are essential for visualizing the nidus and reducing misdiagnosis in atypical cases.

13-year-old male with intra-articular osteoid osteoma of the proximal left femur.

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Published

2025-07-30

Issue

Vol. 19 No. 7 (2025)

Section

Musculoskeletal Radiology

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