The open-ring sign.
Siddiqui
Ata
A
Department of MRI, Grant Medical College, Sir JJ Group of Hospitals, Mumbai, India. dratasiddiqui@yahoo.com
Sahni
Anupam
A
Khadilkar
Satish
S
D002648:Child; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009460:Neurologic Examination; D011782:Quadriplegia / Q000150:complications / Q000000981:diagnostic imaging / Q000473:pathology*; D014057:Tomography, X-Ray Computed; D014786:Vision Disorders / Q000150:complications / Q000000981:diagnostic imaging / Q000473:pathology*