May Cause

Abdominal calcification in an infant or child

Abnormal right upper quadrant abdominal gas collection

Intestinal obstruction in an adult

Large abdominal gas pocket

Lower abdominal mass in a neonate or child

Peritoneal disease

Portal vein gas

Scoliosis

Unilaterally elevated diaphragm

Upper abdominal mass in a neonate or child

Wide mediastinum

May Be Caused by

 Common

Acute appendicitis

Bowel malignancy with perforation

Crohn disease

Diverticultis

Ectopic pregnancy

Endometritis

Pancreatitis

Pelvic inflammatory disease

Peptic ulcer perforation

Postoperative state

Sexually transmitted disease

Trauma

Tubo-ovarian abscess

 Uncommon

Amebiasis

Ascariasis

Intestinal obstruction

Ischemic colitis

Lymphogranuloma venereum

Meconium ileus

Perinephric abscess

Pyelonephritis

Schistosomiasis

Tuberculosis

Typhoid fever

Ulcerative coliitis with toxic megacolon