[Cowper's syringocele as cause of low urinary tract symptoms in a young man].

Cowper's syringocele (CS) is a very rare deformity of male urethra causing obstructive voiding symptoms. This case presents a 39-year-old man suffering from classical low urinary tract symptoms for five years, though without nocturia. The work-up showed normal prostate-specific antigen level, benign conditions by digital rectal examination, and normal-sized prostate on ultrasound. An urodynamic study showed outlet resistance and a supplementary ultrasound of prostate indicated a cyst structure around it. The magnetic resonance imaging confirmed a CS. Marsupialisation is the treatment of choice and was implemented.