Objective: To study the clinicopathological findings of cylindrical cell papilloma (oncocytic schneiderian papilloma) diagnosed among patients at Bahrain Defense Force Hospital with review of literature. Methods: All cases of cylindrical cell papilloma were retrieved from the pathology register from 2006-2010. The medical records of the cases were studied for age, sex, clinical presentation, and imaging reports along with the histopathological findings. Results: Five cases were found and showed male to female ratio 4:1. Their ages were between 36-71 years with average age of 55 years. The main symptom found was unilateral nasal obstruction mainly involving the left side. All papillomas were removed by endoscopic sinus surgery. Four patients had regular followup with complete recovery, while only one case was lost for followup. Conclusion: Cylindrical cell papilloma is a variant of sinonasal schneiderian papilloma. Although most are benign complete excision is the treatment of choice to prevent tumour recurrence as a proportion exhibit unpredictable biological behavior. This study is an important reminder for both clinicians and pathologists to recognize this tumor and to differentiate it from other tumours and rhinosporidiosis. Regular followup is an important strategy for complete recovery and tumour-free surveillance.

Objective: To study the clinicopathological findings of cylindrical cell papilloma (oncocytic schneiderian papilloma) diagnosed among patients at Bahrain Defense Force Hospital with review of literature. Methods: All cases of cylindrical cell papilloma were retrieved from the pathology register...