Coca-cola bottle sign - refers to the appearance of the orbital rectus muscles in thyroid eye disease most commonly caused by Grave’s disease. The belly of the muscle enlarges with sparing of the tendinous insertion simulating the appearance of a traditional coke bottle. This pattern of enlargement is important as in orbital pseudotumour the tendinous insertions are not spared (they are enlarged) which helps in distinguishing between the two conditions.
CT fogging of ischemic stroke - an important non-contrast CT brain phenomenon seen around the second week after a cerebral infarct whereby the infarcted area returns to a normal appearance. This is not due to resolution of the stroke, but is a transient return of brain tissue to normal density and volume. Ultimately however the area will progress towards encephalomalacia and lose volume becoming a chronic infarct.
Others episode in the stroke video series:
RadiologyChannel’s “Pediatric elbow series" - four great free video tutorials!
- Elbow ossification centers - CRITOE
- Elbow joint effusion - sail sign
- Radial head dislocation - radiocapitellar line
- Supracondylar fracture - anterior humeral line
Courtesy of Dr Andrew Dixon and Dr Jeremy Jones. Click to PLAY ALL