@entity101 ( @entity101 ) has been controversially related to @entity531 ( @entity531 ) at the rostral ventrolateral (RVL) medulla in anatomical, surgical, and radiological reports. Our objective was to investigate the association between primary @entity101 and signs of @entity531 at the medulla oblongata on magnetic resonance imaging (MRI) and to explore a new classification based on image criteria. Subjects with (n=64) and without (n=29) @entity101 were studied. Three-millimeter slices, with 1-mm intervals in between, were performed on T2-weighted images in axial and coronal views. Attention was focused on the relationship between the upper medulla and the surrounding arteries. The findings were divided into three categories: 1) non- @entity531 : absence of signs of @entity531 , 2) @entity531 type I: an artery in contact with the RVL medulla but not compressing it, and 3) @entity531 type II: evident compression of the RVL medulla by an artery. Signs of @entity531 were observed in 65.7% (42/64) of the @entity101 group (type I: 39.1%, 25/42 @entity1 ; type II: 26.6%, 17/42 @entity1 ). Among the normotensive subjects, 27.6% (8/29) had signs of @entity531 ; only one (3.3%) of these had @entity531 type II (evident compression), and the rest were @entity531 type I. We conclude that the presence of @entity531 at the RVL medulla on MRI is related to @entity101 . More importantly, the finding of frank compression ( @entity531 type II) is present almost exclusively in @entity101 subjects; only one individual (3.3% of our normotensive population) had @entity531 type II.

The spectrum of magnetic resonance imaging findings in XXXX .

@entity1 :: ('9606', 'Species') :: ['patients'] @entity531 :: ('MESH:D013901', 'Disease') :: ['neurovascular compression', 'NVC'] @entity101 :: ('MESH:D006973', 'Disease') :: ['HTN', 'hypertensive', 'Hypertension']
@entity101 :: (MESH:D006973,Disease) :: ['hypertension-related neurovascular compression']
