XXXX with heterogeneous suppression on chemical shift imaging: clinical implications.

@entity75 @entity1 @entity652 @entity4383
PURPOSE: To investigate the frequency and significance of adrenal lesions that demonstrate heterogeneous suppression on chemical shift magnetic resonance imaging (MRI). MATERIALS AND METHODS: A retrospective search of adrenal lesions identified on MR from November 1997-July 2001 was performed. The adrenal lesions were classified as having suppression typical for an @entity652 , nonsuppression, or atypical heterogeneous suppression. Lesions with heterogeneous suppression were further reviewed. Follow-up for the heterogeneous lesions consisted of imaging studies or pathology from surgical excision. RESULTS: @entity75 were identified in 242 @entity1 . Heterogeneously suppressing lesions were seen in 34 (14%) @entity1 . Several different patterns of heterogeneous suppression were identified. Imaging or pathologic follow-up was available for 18 of the heterogeneously suppressing lesions (one @entity1 had both). Fifteen @entity1 with follow-up imaging showed stability of the lesion over a significant interval, suggesting a benign lesion. Pathology was available for four @entity1 revealing two @entity1 with @entity652 and two @entity1 with @entity4383 . Thus, all 18 @entity1 with heterogeneous suppression had a benign lesion. CONCLUSION: @entity75 that have a heterogeneous pattern of suppression on out-of-phase chemical shift MR images are a common finding. Our small series suggest that these lesions are probably benign.
