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Figure 3 | Journal of Medical Case Reports

Figure 3

From: Solitary pulmonary nodule of benign metastasizing leiomyoma associated with primary lung cancer: a case report

Figure 3

Histopathology of the lung tumor in her left S4. (A) Pathological examination of the lung small nodule in her left S4 segment reveals that the tumor is composed of spindle-shaped smooth muscle cells and a low cuboidal metaplastic bronchiolar epithelium, surrounded by fascicles of smooth muscle cells without mitosis or nuclear atypia (hematoxylin and eosin staining, × 400). (B) Immunohistochemical staining for TTF-1 shows positive immunoreactivity in epithelial structures including alveoli or bronchioli (× 400). (C) Immunohistochemical staining for SP-A shows positive immunoreactivity for epithelial structures including alveoli or bronchioli (× 800). (D) Immunohistochemical staining for α-SMA is positive in spindle-shaped cells (× 400). (E) Immunohistochemical staining for ER is positive in spindle-shaped cells (× 400). (F) Immunohistochemical staining for PgR is positive in spindle-shaped cells (× 400).

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