MR Angiography Follow-Up 10 Years after Cryptogenic Nonperimesencephalic XXXX .

@entity1 @entity2806 @entity548 @entity510 @entity27791 @entity439 @entity2553
OBJECTIVES: Long-term magnetic resonance angiography (MRA) follow-up studies regarding cryptogenic nonperimesencephalic @entity510 (nSAH) are scarce. This single-centre study identified all @entity1 with angiographically verified cryptogenic nSAH from 1998 to 2007: The two main objectives were to prospectively assess the incidence of de novo @entity439 with 3.0-MRI years after cryptogenic nSAH in @entity1 without evidence for further @entity548 , and retrospectively assess @entity1 demographics and outcome. METHODS: From prospectively maintained report databases all @entity1 with angiographically verified cryptogenic nSAH were identified. 21 of 29 @entity1 received high-resolution 3T-MRI including time-of-flight and contrast-enhanced angiography, 10.2    2.8 years after cryptogenic nSAH. MRA follow-up imaging was compared with initial digital subtraction angiography (DSA) and CT/MRA. Post- @entity548 images were related to current MRI with reference to persistent lesions resulting from delayed @entity2806 (DCI) and post-hemorrhagic @entity27791 . @entity1 -based objectives were retrospectively abstracted from clinical databases. RESULTS: 29 @entity1 were identified with cryptogenic nSAH, 17 (59%) were male. Mean age at time of @entity548 was 52.9    14.4 years (range 4 - 74 years). 21 @entity1 were available for long-term follow-up. In these, there were 213.5 @entity1 years of MRI-follow-up. No de novo @entity439 was detected. Mean modified Rankin Scale (mRS) during discharge was 1.28. Post- @entity548 radiographic @entity2553 was found in three @entity1 (10.3%); DCI-related lesions occurred in one @entity1 (3.4%). Five @entity1 (17.2%) needed temporary external ventricular drainage; long-term CSF shunt dependency was necessary only in one @entity1 (3.4%). Initial DSA retrospectively showed a 2 x 2 mm @entity439 of the right distal ICA in one @entity1 , which remained stable. Post- @entity548 @entity27791 was detected 8.1 years after the initial @entity548 in one @entity1 (4.8%). CONCLUSION: @entity1 with cryptogenic nSAH have favourable outcomes and do not exhibit higher risks for de novo @entity439 . Therefore the need for long-term follow up after cryptogenic nSAH is questionable.
