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Oncocytic Schneiderian papilloma
Chia-Yu Liu1, Tung-Lung Tsai, Chih-Yi Hsu
1Department of Otolaryngology, Taipei Veterans General Hospital, Taipei, Taiwan, ROC.
Journal of the Chinese Medical Association : JCMA
|September 11, 2004
Summary
Oncocytic Schneiderian papilloma is a rare sinonasal tumor. This case highlights its endoscopic removal and differential diagnosis from sinonasal adenocarcinomas.
Area of Science:
- Otorhinolaryngology
- Pathology
Background:
- Oncocytic Schneiderian papilloma (OSP) is a rare tumor of the Schneiderian membrane, accounting for approximately 3-5% of sinonasal papillomas.
- Characterized by a multi-layered eosinophilic epithelium, OSP can present with exophytic or inverted growth patterns.
- It is often misdiagnosed as sinonasal adenocarcinomas, which have a single-layered epithelium.
Observation:
- This report details a case of OSP originating in the anterior ethmoid sinus and extending into the maxillary sinus.
- Preoperative imaging revealed lamina papyracea destruction, but microscopic examination confirmed no malignancy.
- The tumor was successfully removed using an endoscopic approach.
Findings:
- OSP exhibits behaviors similar to inverted papillomas, including local recurrence and potential for malignancy.
- Differential diagnosis is crucial, especially for unilateral nasal polypoid lesions.
- The etiology of OSP remains undetermined.
Implications:
- Endoscopic surgery is a viable treatment option for OSP, with external approaches reserved for extensive cases.
- Accurate pathological differentiation from sinonasal adenocarcinomas is essential for appropriate management.
- OSP should be considered in the differential diagnosis of unilateral sinonasal masses.