Alia Yassine Kassab, Mehdi Salmane, Lina Lasri, Siham El Haddad, Nazik Allali, Latifa Chat
Journal: Medpeer Publisher
ISSN: 3066-2737
Volume: 3
Issue: 1
Date of Publication: 2026/01/27
Osteoid osteoma is a benign osteoblastic tumor that commonly affects children and adolescents and can cause significant nocturnal pain. We present the case of a 9-year-old girl with persistent pain in the distal third of the right femoral diaphysis, notably relieved by aspirin. Plain radiographs showed a subtle lucent lesion, while CT imaging revealed a well-defined 6 mm intra-spongious nidus with mild reactive sclerosis. MRI demonstrated low T1 and high T2/STIR signal with minimal surrounding marrow edema. This case highlights the diagnostic challenges of intra-spongious osteoid osteomas, which are often inconspicuous on radiographs. CT remains the gold standard for nidus identification and preprocedural planning. Recognizing the characteristic clinical presentation, combined with advanced imaging, allows timely and minimally invasive treatment, such as CT-guided radiofrequency ablation. Early diagnosis is essential to relieve pain, prevent prolonged disability, and avoid unnecessary interventions.
Osteoid Osteoma, Intra-Spongious, Distal Femur, Pediatric Bone Tumor, Case report
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