Common causes of acute abdomen grouped according to age of presentation:

Infants

Children Adults.

Viral enteritis Meckels diverticulitis PID.

Intussusception Cystitis

Appendicitis.

Pyelonephritis Viral enteritis Mittleschmerz.

Bacterial enterocolitis

Appendicitis Crohn's disease.

Pneumonitis Crohn's disease Pancreatitis.

Appendicitis Enterocolitis Hollow viscus perforation.

Pyloric stenosis Pneumonitis Intestinal obstruction.

Testicular torsion Pancreatitis Pneumonia.

Mesenteric cysts Ruptured tumors Hematocolpos.

Ruptured tumors Pyelonephritis Viral enteritis.

Pancreatitis Peptic ulcer.

Meckel's diverticulitis Ectopic pregnancy.

Peptic ulcer.

Infants Children Adults.

Hirchsprung's disease Cholelithiasis.

Strangulated hernia Malignant obstruction perforation.

Psychosomatic.

Enterocolitis.

Laboratory test:

CBC, urine analysis.

S. amylase.

ßhcg / pregnancy test.

S.electrolytes/BUN/creatinine/blood sugar.

Liver function test.

Radiology _ roentgenogram.

Chest and abdomen _ erect Findings _ air under diaphragm, air fluid levels, faecoliths.

Gallstones, obliteration of psoas shadow, ultrasound abdomen.

DFH-GS-

*Prof. of Surgery

Sri Ramachandra Medical College & Research Institute (Deemed University)