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Updated: Jul 17, 2026
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Identification of OTX1 and OTX2 As Two Possible Molecular Markers for Sinonasal Carcinomas and Olfactory Neuroblastomas
Published on: February 28, 2019
Osteoblastoma of the ethmoid sinus
Yong-Koo Park1, Eui Jong Kim, Sung Wan Kim
1Department of Pathology, School of Medicine, Kyung Hee University, Seoul, South Korea. ykpark@khmc.or.kr
Skeletal Radiology
|February 1, 2007
Summary
A rare osteoblastoma occurred in the ethmoid sinus of a 13-year-old boy, causing exophthalmos. Surgical removal was successful, highlighting this unusual tumor presentation.
Area of Science:
- Oncology
- Otorhinolaryngology
- Pathology
Background:
- Osteoblastomas are rare, benign bone tumors typically found in the spine and long bones.
- Paranasal sinus osteoblastomas are exceptionally uncommon, with limited case reports in medical literature.
Observation:
- A 13-year-old male presented with exophthalmos due to an osteoblastoma in the ethmoid sinus.
- CT imaging revealed an expansile lesion with mixed ground glass opacity and dense bone, causing orbital compression.
- MRI showed intense enhancement in less dense areas and signal voids in sclerotic regions.
Findings:
- Histological examination confirmed the diagnosis of osteoblastoma, characterized by proliferating osteoblasts, woven bone trabeculae, and vascular fibrous stroma.
- The tumor's unique presentation in the ethmoid sinus led to significant orbital displacement.
Implications:
- This case underscores the importance of considering rare tumor locations in differential diagnoses for sinonasal masses.
- Surgical management via curettage was effective for this ethmoid sinus osteoblastoma.
- Further review of literature on osteoblastomas in unusual head and neck locations is warranted.
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