Figure 1. Pathological examination of the mammary leiomyomatous tumor. A: Macroscopic image of the tumor with surrounding tissue. B: Hematoxylin and eosin (H&E)-stained section showing a well-demarcated tumor (lower part) facing normal breast tissue, ×20. C: H&E-stained section showing bundles of smooth muscle without atypia against a collagen-rich background, ×40. D: The H&E-stained section of C shown at higher magnification ×200. E: Immunohistochemical staining for smooth muscle actin, highlighting smooth muscle cells, ×40. F: Immunohistochemical staining for caldesmon, ×100. G: Immunohistochemical staining with desmin, ×100.