case_images: PMC7750755_01
case_images: Prominent staghorn blood vessels.
case_images: 10.1177_2050313X20981177-fig1.jpg
case_images: PMC7750755_01_10.1177_2050313X20981177-fig1.jpg
case_images: fig1-2050313X20981177
case_images: A prominent hemangiopericytoma-like vascular pattern was observed (Figure 1).
case_images: Tumor cells positive for (a) TTF1, (b) synaptophysin, and (c) chromogranin and (d) Ki67
  proliferative index was approximately 80%.
case_images: 10.1177_2050313X20981177-fig2.jpg
case_images: PMC7750755_01_10.1177_2050313X20981177-fig2.jpg
case_images: fig2-2050313X20981177
case_images: S100 and BCL2. The Ki67 proliferative index was approximately 80% (Figure 2). Small cell carcinoma was the preferred diagnosis.