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Updated: Mar 23, 2026

Intra-iliac Artery Injection for Efficient and Selective Modeling of Microscopic Bone Metastasis
Published on: September 26, 2016
OSTEOID OSTEOMA IN THE ILIAC BONE: REPORT ON TWO CASES
Elmano de Araújo Loures1, Bruno Fajardo do Nascimento2, Marcelo de Carvalho Amorim2
1Specialist in Orthopedics and Traumatology; Supervisor of the Medical Residence Program in Orthopedics and Traumatology, Department of Orthopedics and Traumatology, University Hospital, Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil.
Osteoid osteoma, a benign bone tumor, can present atypically with sciatic pain, even in unusual iliac locations. Early diagnosis and surgical excision of the nidus lead to asymptomatic recovery and bone remodeling.
Area of Science:
- Orthopedic Surgery
- Oncology
- Radiology
Background:
- Osteoid osteoma is a benign bone tumor typically causing nocturnal pain relieved by salicylates.
- While it can affect any bone, iliac involvement is uncommon.
- This tumor often presents diagnostic challenges due to subtle radiographic findings.
Observation:
- Two cases of intramedullary osteoid osteoma adjacent to the sacroiliac joint presented with sciatic pain.
- Initial radiographs revealed sclerotic lesions, but diagnosis was delayed.
- Computed tomography (CT) scans confirmed the diagnosis and identified the nidus.
Findings:
- Surgical en bloc resection of the nidus was performed.
- Histopathological examination confirmed the definitive diagnosis.
- Both patients remained asymptomatic post-surgery with complete bone remodeling observed during follow-up.
Implications:
- Highlights the importance of considering osteoid osteoma in the differential diagnosis of sciatic pain, especially with sclerotic bone lesions.
- Emphasizes the utility of CT scans for accurate diagnosis in unusual locations.
- Demonstrates the efficacy of surgical nidus excision for favorable long-term outcomes.
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