Prediction of @entity548 transformation after acute XXXX using hyperintense MCA sign.

@entity1 @entity548 @entity2500 @entity715 @entity70764 @entity385
PURPOSE: The hyperintense appearance of the @entity2500 (HMCA) sign consists of a thickened MCA stem with a blurred intense signal on contrast enhanced T1-weighted magnetic resonance imaging (T1W MRI). In this article, we define it and determine its incidence, diagnostic value, and reliability by comparison with magnetic resonance angiography and digital subtraction angiography. MATERIALS AND METHIODS: Non-contrast CT and immediately subsequent MRI were performed on 30 consecutive @entity1 with acute @entity385 within 6 hours after symptom onset. Ml @entity1 underwent at least one follow-up MRI or non-contrast CT within 2-7 days. Initial studies were analyzed for @entity70764 sign on post-Gd T1WI. Vascular findings on both MRI and CT were compared with findings at MRA and DSA. RESULTS: Eleven @entity1 were developed subsequent HT at follow-up studies. The HMCA sign on MRI was found in 6 @entity548 @entity1 (P=0.00), and all of them had M1 occlusion on angiography. None of the @entity1 in nonhemorrhagic group had HMCA sign on MRI. CONCLUSION: HMCA sign on post-Gd T1WI is highly specific and moderately sensitive indicator of acute @entity715 with M1 MCA segment, as validated by angiography. Additionally, HMCA sign may be a useful marker of subsequent HT in acute @entity385 .
