title: MR imaging of skeletal muscle hemangiomas. A report of 16 cases.
abstract: OBJECTIVE
  Our purpose was to evaluate how MR imaging depicts the vascular fibrofatty structure of hemangiomas.
  
  
  METHODS
  MR images of 16 histologically proven skeletal muscle hemangiomas were reviewed retrospectively in a nonblinded manner. One patient was examined at 0.5 T, 9 at 1.0 T, and 6 at 1.5 T, and the imaging protocols varied.
  
  
  RESULTS
  All lesions were lobulated/tubular. Signal characteristics of fat were seen in 13 lesions as lace-like thin septa within or around the tumor. All 16 studies exhibited a hyperintense signal on T2-weighted spin-echo (SE) (n=15) or T1-weighted fast fat suppressed inversion recovery SE images (n=1). Postcontrast images showed marked signal enhancement in parts of the areas, both of high and low T2-weighted signal. Surgical staging based on MR images was correct in all lesions.
  
  
  CONCLUSIONS
  MR images display the characteristic vascular fibrofatty structure of hemangiomas and may allow correct diagnosis.
authors.affiliation: Department of Radiology, Karolinska Hospital, Stockholm, Sweden.
authors.forename: G
authors.initials: G
authors.lastname: Jenner
authors.forename: V
authors.initials: V
authors.lastname: Söderlund
authors.forename: H F
authors.initials: HF
authors.lastname: Bauer
authors.forename: O
authors.initials: O
authors.lastname: Brosijö
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D005260:Female; D006391:Hemangioma / Q000175:diagnosis*; D006801:Humans; D007223:Infant; D008279:Magnetic Resonance Imaging; D008297:Male; D018482:Muscle, Skeletal; D012189:Retrospective Studies; D012983:Soft Tissue Neoplasms / Q000175:diagnosis*