Radiology signs- A

A

Accordion sign 

Appearance of bowel that may be seen with pseudomembranous colitis.

Marked submucosal edema (arrows) is present in the right colon. Oral contrast material (arrowhead) is trapped within the lumen

Air crescent sign 

 On healing, interval development of at least two air crescent signs (arrowheads), which coincided with recovery of the patient’s white blood cell count.

Appearance of cavitation that may be seen with invasive apergillosis.

Anteater's nose sign 

Sign of calcaneonavicular tarsal coalition.

Apple Core lesion 

Circumferential narrowing of the lumen secondary to colon cancer.