Fifty cadaver halves were dissected to determine the occurrence and lo
cation of the corona mortis. Anastomoses between the obturator and ext
ernal iliac systems occurred in 84% of the specimens, Thirty-four perc
ent had an arterial connection, 70% had a venous connection, and 20% h
ad both, The distance from the symphysis to the anastomotic vessels av
eraged 6.2 cm (range, 3-9 cm).