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The sternalis muscle (TA: musculus sternalis 8), also known as rectus sternalis or parasternalis 7, is an uncommon chest wall accessory muscle and is of uncertain etiology and function. Its importance lies in that it should not be mistaken for a pathological lesion.
4 maj 2012 · An improved technique with a systematic approach to patient positioning enables visualization of the deep parts of the breast. The sternalis muscle is occasionally observed in mammograms as a variant of the deep normal structures and may mimic a mass.
22 cze 2023 · The mammographic appearance of the sternalis muscle is variable. Typically it is visible in the medial aspect of the breast on the craniocaudal mammogram and appears as a small soft tissue density/mass abutting the chest wall.
Ultrasound imaging of the sternalis muscle reveals a well-defined, hypoechoic structure with internal striations, consistent with the appearance of skeletal muscle. Ideally, its continuity with chest wall muscles can be traced to prove muscular origin.
19 sty 2013 · The sternalis muscle is an unusual variant of the chest wall musculature. It may be visible as a rounded or irregular density on the craniocaudal mammogram along the sternal edge of the film. With improved mammographic positioning it will be seen more frequently.
The sternalis muscle is a normal anatomic variant, present in 6 - 8% of people. It can be misinterpreted as a potentially worrisome mass on a screening mammogram, leading to unnecessary extra views, diagnostic workups and even biopsies.
16 sty 2014 · When present and detected preoperatively it can be used as a muscular flap in reconstructive surgeries of the breast and neck. This article will present the sternalis muscle with special emphasis on its morphology, homology, and clinical significance.
