Muscular variant presenting as an asymmetry on mammogram

Haley Letter, Santo Maimone, Robert Maxwell

Research output: Contribution to journalArticlepeer-review


Anatomic variants in chest wall musculature can pose a potential diagnostic dilemma when visible on a mammogram. A few variants have been commonly reported in the literature and can be confidently identified by appearance and location. We present a case of a pectoralis muscle variant, not previously described in radiology literature that presented as a unilateral asymmetry on a screening mammogram. This article reviews common imaging appearances of muscular variants seen mammographically and provides a diagnostic algorithm to avoid unnecessary workup or biopsy.

Original languageEnglish (US)
Pages (from-to)2370-2372
Number of pages3
JournalRadiology Case Reports
Issue number7
StatePublished - Jul 2022


  • Asymmetry
  • Mammogram
  • Muscular variant

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


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