Accordion Sign

 

                                                               Accordion Sign  

 

 

 

The Concertina sign (also called the accordion sign) on X-ray is a radiological feature most classically associated with pseudomembranous colitis, especially due to Clostridioides difficile infection. 

 

Severe inflammation → marked mucosal edema

Thickened haustra → deep folds

Contrast (on CT more than plain X-ray) gets trapped between folds

Creates a striped / layered pattern

 

 

 

 

 

 

 

Snapshot