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.
 Imaging Findings for Elastofibroma dorsi
- 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.
- 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.
- Well-defined multilayered pattern of hypoechoic linear areas of fat deposition intermixed with echogenic fibroelastic tissue.
 External Links
 References for Elastofibroma dorsi
- Jennifer E. Ochsner, Sarah A. Sewall, Gregory N. Brooks, and Rashmi Agni. Best Cases from the AFIP: Elastofibroma Dorsi. RadioGraphics 2006 26: 1873-1876.