<unk>  refers to a sudden, severe pain in the<unk>  that is less than 24 hours in duration.  It is in many cases an emergency condition requiring urgent and specific diagnosis, and the treatment usually involves surgery.
Acute abdomen
Acute pancreatitis
Hemoperitoneum
Pneumoperitoneum
Acute cholecystitis
Splenic rupture
Gallstone ileus
Secondary peritonitis