Hemorrhagic acalculous cholecystitis is an extremely rare but potentially fatal disease if detection is delayed. Its
risk factors include critical illness, diabetes, malignant disease, uremia, and bleeding diathesis. This is the first
case report in which hemorrhagic acalculous cholecystitis not accompanied by any risk factor. We herein present
a case of hemorrhagic acalculous cholecystitis in a previously healthy patient who suffered from acute abdomen.