OBJECTIVE: To correlate the magnetic resonance imaging (MRI) features with the histopathologic findings in @entity1642 ( @entity1642 ) of the femoral head. DESIGN AND @entity1 : This study was based on a retrospective review of the MRI features and histopathologic findings in seven @entity1 with @entity1642 who had had total hip replacement. Results. In all seven cases, MRI showed a @entity236 pattern in the femoral head, and a focal low-intensity band beneath the articular cartilage on some slices (not all) on the T1-weighted images. The shape of the low-intensity band varied: it was irregular and @entity9155 in four cases, well-delineated, smooth, and a mirror image to the articular surface in two cases, and parallel to the articular surface in one case. On histologic examination, the low-intensity band on MRI corresponded to a @entity174 line and its associated repair tissue. In all but one case, the band was not visible on T2-weighted or fat suppression images, and the proximal subchondral portion of the lesion had a homogeneous high signal intensity. This region of high signal intensity corresponded histopathologically to viable bone and marrow tissue with associated callus, @entity4 , and vascular granulation tissue. CONCLUSIONS: @entity1642 of the femoral head characteristically demonstrates a low-intensity band on T1-weighted images that corresponds, histopathologically, to a linear subchondral @entity174 and its associated repair tissue. In most cases, the subchondral portion of the lesion appears on T2-weighted images as an area of homogeneously high signal intensity.

Subchondral insufficiency XXXX of the femoral head: histopathologic correlation with MRI.

@entity1 :: ('9606', 'Species') :: ['patients', 'PATIENTS'] @entity174 :: ('MESH:D050723', 'Disease') :: ['fracture'] @entity4 :: ('MESH:D004487', 'Disease') :: ['edema'] @entity9155 :: ('CHEBI:46670', 'Chemical') :: ['serpentine'] @entity236 :: ('MESH:D001855', 'Disease') :: ['bone marrow edema'] @entity1642 :: ('MESH:D015775', 'Disease') :: ['subchondral insufficiency fracture', 'SIF']
@entity174 :: (MESH:D050723,Disease) :: ['fracture']
