PMC9647069_01
(A-C) showed plain and enhanced CT scan, showing mixed density foci inside the left serratus anterior muscle, calcification and fat density, no significant enhancement after enhancement, and no bone destruction in adjacent ribs. (D-H) showed plain and enhanced MRI, with high signal on T2WI and stripe low signal inside the left serratus anterior muscle, isosignal in T1WI, stripe high signal inside, low signal in reverse phase, and high signal in DWI. After enhancement, no significant enhancement was observed in the center of the lesion, and enhancement was observed at the edge.
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Chest CT ( Figure 1 ) showed a semicircle mixed density shadow under the muscularlayer in front of the scapula on the left side of the chest wall, multiple nodular calcification foci and fat density foci were observed in the chest wall, with a clear boundary and a size of 63.2*35.3*64.2mm. MRI ( Figure 1 ) of the chest showed a mass between the left serratus anterior and the ribs, which was considered as a benign lesion.
(A, HEx10; B, HEx40) Under the light microscope, the tumor showed multi-nodular growth, fat wrapped around the nodular growth cartilage, calcification in the center of some cartilage nodules, and no obvious atypia of chondrocytes.
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Postoperative histopathological examination ( Figure 2 ) revealed a nodular mass (on the left shoulder and back) with a size of 7.5x6x3.5cm and complete capsule.