The leech is an invertebrate which has the habit of entering the anatomical
orifices of man and animals. During the process of sucking blood it releas
es an anticoagulant and causes continuous bleeding from the bite site. A le
ech as a cause of gross hematuria is unusual. We present a case of a leech
in the bladder as a cause of gross hematuria, Copyright (C) 2001 S. Karger
AG, Basel.