Discussion of Radial scar
- Radial scars (complex sclerosing lesions) are not truly scars
- Idiopathic entities unrelated to prior surgery or trauma.
- Proposed possible causes include localized inflammatory reaction and chronic ischemia with subsequent slow infarction
- Reported prevalence of radial scars is 0.1–2.0 per 1,000 screening mammograms
- Major clinical significance pertains to an association with atypical ductal hyperplasia and carcinoma that is seen in up to 50% of cases.
- Excisional biopsy should be performed when imaging findings are consistent with radial scar.
- Core needle biopsy, fine-needle aspiration, and frozen sectioning are not routinely recommended for definitive diagnosis because the precise pathologic diagnosis of these lesions is difficult.
 Imaging Findings for Radial scar
- Manifests as an asymmetric density or architectural distortion with central translucent areas representing fat.
- Long, thin radiating spicules against a background of radiolucent fat create a "black star" appearance.
- Radial scars are typically planar in configuration and therefore may have varying appearances on orthogonal views.
- Associated microcalcifications have been reported.
 See Also
 External Links
 References for Radial scar
- D. Quentin Alleva, Dana H. Smetherman, Gist H. Farr, Jr, and Gunnar J. Cederbom. Radial Scar of the Breast: Radiologic-Pathologic Correlation in 22 Cases. RadioGraphics 1999 19: 27-35.