case_images: PMC11822275_01
case_images: Sternalis muscles in two patients; one is the 23-year-old male case report subject with hypertrophic sternalis muscles presenting with bilateral breast enlargement, and another 42-year old female with a unilateral sternalis muscle which was incidentally found on CT.. A. MLO mammogram of the 23-year-old male shows a longitudinally oriented mass on either side of the medial chest wall near the caudal portion of the pectoralis muscle (arrows).. B. CC mammogram of the 23-year-old male confirms that the apparent masses were lying in the classical location of the posteromedial breast (arrows).. C. Representative images of a supplementary bilateral breast US scan show no intramammary mass in the 23-year-old male.. D. A 42-year-old woman with a sternalis muscle in the right anterior chest wall. A routine axial multidetector CT image (left image) shows a unilateral sternalis muscle (arrow) superficial to the right edge of the sternum. Coronal section (right image) demonstrates the corresponding muscle (arrows) with a fusiform shape and fascicle formation, reflecting a muscular architecture, running longitudinally in a CC orientation.. CC = craniocaudal, MLO = mediolateral oblique
case_images: jksr-86-160-g001.jpg
case_images: PMC11822275_01_jksr-86-160-g001.jpg
case_images: F1
case_images: Upfront mediolateral oblique (MLO) mammogram was initially performed in accordance with the institution's protocol for male breast imaging (Fig. 1A). On the craniocaudal (CC) mammogram (Fig. 1B), the masses were lying in the classical location of the posteromedial breast. A supplementary breast US scan showed no intramammary mass (Fig. 1C).