[Hypertrophy of the internal urethral sphincter in children (author's transl)].

On the basis auf 2 cases congenital hypertrophy of the internal urethral sphincter the authors discuss problems of diagnosis and therapy. They attribute great importance particularly to the urodynamic approach in the assessment of disorders of urinary flow in children. Compared with static or non-physiological methods, such as endoscopy or retrograde urethrography functional diagnostic methods like uroflow, manometry and MCU have definite advantages, precisely where it is a matter of analysing functional disorders. However, if the child is to be spared protracted obstruction of urinary flow, early diagnosis is a prerequisite.