"calcification: Thin, eggshell-like rim is classic. There may also be none, amorphous, or flocculant calcifications."
"air: A large air-fluid level may be present. In the absence of calcifications, this can be confused for a dilated loop of bowel or loculated pneumoperitoneum."
"displaced bowel: In the absence of calcification and air, displaced bowel may be the only finding on x-ray."
"calcification: Thin, eggshell-like rim is classic. There may also be none, amorphous, or flocculant calcifications."
"air: A large air-fluid level may be present. In the absence of calcifications, this can be confused for a dilated loop of bowel or loculated pneumoperitoneum."
"displaced bowel: In the absence of calcification and air, displaced bowel may be the only finding on x-ray."