Dikov D, Vassilev I, Dimitrakov J. Nonspecific granulomatous prostatitis with calculous ductal ectasia and extensive Paneth cell-like epithelial metaplasia: a case report. APMIS 2005;113:564–7. We present a case of nonspecific granulomatous prostatitis in combination with calculous ductal ectasia and extensive epithelial Paneth cell-like metaplasia in a TURP-specimen. Our report highlights the importance of calculous ductal obstruction and stasis of secretions in the etiopathogenesis of this type of prostatitis. The observed extensive Paneth cell-like metaplastic change in adjacent epithelial cells most likely represents a phenotypic adaptive mechanism directed against foreign antigens and nondegradable lipids in the stagnant intraluminal debris.