disease of anatomical entity
   |__urinary system disease
       |__urethral disease
           |__fibroepithelial polyp of urethra
           |__prolapse of urethra
           |__Trichomonas vaginalis trichomoniasis
           |__urethra cancer
           |   |__female urethral cancer(+)
           |   |__male urethral cancer(+)
           |   |__urethra adenocarcinoma(+)
           |   |__urethra squamous cell carcinoma(+)
           |   |__urethra transitional cell carcinoma
           |__urethral benign neoplasm
           |   |__nephrogenic adenoma of the urethra
           |   |__paraurethral gland neoplasm
           |   |__urethra leiomyoma
           |   |__urethral urothelial papilloma(+)
           |   |__urethral villous adenoma
           |__urethral calculus
           |__urethral diverticulum
           |__urethral false passage
           |__urethral gland abscess
           |__urethral intrinsic sphincter deficiency
           |__urethral obstruction
           |   |__urethral stricture(+)
           |__urethral syndrome
           |__urethritis