"Two defined transition points are seen in the minority of cases of cecal volvulus; a single transition point is more sensitive for cecal volvulus."

Findings of Cecal Volvulus at CT
Rosenblat JM et al.
Radiology 2010; 256;169-175

"When cecal volvulus is suspected, the absence of distal colonic decompression on CT topograms makes the diagnosis very unlikely. Whirl, ileocecal twist, transition points, X-marks-the-spot, and split wall have high specificity for cecal volvulus."

Findings of Cecal Volvulus at CT
Rosenblat JM et al.
Radiology 2010; 256;169-175