UNASSIGNED: MRI is the primary screening tool for @entity1 with @entity602 . The decision to obtain additional imaging, notably spinal angiography, is generally based on initial MRI findings. This study retrospectively analyzed the yield of initial MRI in a cohort of @entity1 with angiographically confirmed @entity1462 . MRI obtained at symptom onset was available in 115 @entity1 with either high-flow (29 cases) or low-flow (86 cases) @entity1462 . MRI was classified as "positive" when the report mentioned a @entity1462 or "negative" when considered normal or when another diagnosis was suggested. Initial MRI was positive in 61 @entity1 (53.0%), correctly identifying 28 high-flow (96.6%) but only 33 low-flow (38.4%) lesions. Flow voids were noted in 96.6% of the high-flow lesions and 38.4% of the low-flow ones. @entity9212 (77.4%) and parenchymal enhancement (54.5%) were also common in low-flow anomalies. @entity1 with negative MRI had an average delay of 111  days before angiography and 239  days before therapy; these intervals were 27 and 76  days for those with positive MRIs. In summary, MRI shows a high yield for high-flow @entity1462 , i.e., characterized by prominent flow voids on T2-weighted images, but misdiagnosed over 60% of low-flow lesions. The percentage of correctly identified anomalies matched the percentage of observed flow voids in both groups, indicating over-reliance on this sign for the diagnosis of @entity73 . MRI findings in slow-flow @entity1462 overlap with other conditions, notably transverse @entity4685 , which was initially misattributed to 40% of the @entity73 in our cohort.

The yield of initial conventional MRI in 115 cases of angiographically confirmed XXXX .

@entity1 :: ('9606', 'Species') :: ['Patients', 'patients'] @entity73 :: ('MESH:D003072', 'Disease') :: ['slow-flow lesions'] @entity602 :: ('MESH:D013118', 'Disease') :: ['myelopathy'] @entity4685 :: ('MESH:D009187', 'Disease') :: ['myelitis'] @entity9212 :: ('MESH:C535434', 'Disease') :: ['T2-signal anomalies'] @entity1462 :: ('MESH:D054079', 'Disease') :: ['vascular malformations', 'vascular malformation']
@entity1462 :: (MESH:D054079,Disease) :: ['spinal vascular malformations']
