Elastofibroma dorsi

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[edit] Discussion of Elastofibroma dorsi

  • Elastofibroma dorsi is a benign soft-tissue tumor with a characteristic location and appearance at CT.
    • Location: Elastofibroma dorsi is classically found in the infrascapular regions, deep to the serratus anterior and latissimus dorsi musculature.
    • CT appearance: Poorly defined soft-tissue mass with attenuation similar to that of the adjacent skeletal muscle is seen.

  • Unilateral masses have a slight right-sided predilection, but up to 60% of elastofibromas are bilateral.
  • Elastofibroma dorsi is most frequently seen in older women, with a reported female predilection of 5–13:1 and a mean age at diagnosis of 65–70 years .

  • At clinical examination, elastofibroma dorsi is often asymptomatic.
  • In up to 50% of patients, however, elastofibroma dorsi may cause moderate pain and clicking, snapping, or clunking of the scapula with movement.

  • Elastofibroma dorsi is composed of fibrous tissue with internal fatty streaks.

[edit] Imaging Findings for Elastofibroma dorsi

[edit] CT

  • The CT appearance of elastofibroma dorsi is diagnostic.
  • A poorly defined soft-tissue mass in the infrascapular or subscapular region with attenuation similar to that of the adjacent skeletal muscle is seen.

[edit] MRI

  • Demonstrate patterns of alternating fibrous and fatty tissue at MR imaging.
    • Fibrous tissue is isointense relative to skeletal muscle with both T1- and T2-weighted sequences
    • Fatty tissue has high signal intensity with T1-weighted sequences.
  • The borders of these masses are relatively well defined, but the mass is nonencapsulated.
  • Contrast-enhanced MR images have been reported to show both areas with and areas without enhancement.

[edit] US

  • Well-defined multilayered pattern of hypoechoic linear areas of fat deposition intermixed with echogenic fibroelastic tissue.

[edit] Images

Patient #1

[edit] External Links

Goldminer: Elastofibroma

[edit] References for Elastofibroma dorsi