3. Inflammatory
•Situated at anterior urethra
•Most commonly in the proximal bulbar
• multiple , any length
• causes ,Gonococci , Chlamydia , TB 2% Reiter's syndrome , syphilis , chemical
4. Traumatic
• at membranous urethra / posterior urethra
•Most commonly following catheterization, surgery ,
• multiple , or single , usually short
• complication / transaction , psedodiverticula , fistula , sinuses