<unk>  is defined as 'symptoms suggestive of a lower tract urinary infection but in the absence of significant bacteruria with a conventional pathogen. There are other non-infective causes that should be considered such as trauma, allergies, and anatomical features like diverticula and post surgical scarring.
Urethral syndrome
Urethral diverticulum
Neurogenic bladder
Urinary bladder hernia
Hydrocele
Urethral stricture
Bladder diverticulum
Urethral cancer