Sacral decubiti, the median sacral artery, fluorescein, and acts of God.
Webster
R M
RM
Schermerhorn
T J
TJ
D001157:Arterial Occlusive Diseases / Q000150:complications / Q000503:physiopathology*; D006801:Humans; D003668:Pressure Ulcer / Q000209:etiology; D012445:Sacrococcygeal Region