Figure 5.

Histopathological findings. The carcinosarcoma mainly comprised undifferentiated sarcoma components, intermixed with areas of poorly to moderately differentiated squamous cell carcinoma. Section (a) shows the sarcoma component and (b) the carcinoma component (Hematoxylin and Eosin staining ×100). (c) In immunostaining with anti-G-CSF antibodies and d) anti-IL-6 antibodies, positive cells were seen only in the sarcoma component. G-CSF- and IL-6-positive cells were found in proportions of approximately 13% and 20%, respectively, with moderate or greater positivity. G-CSF: granulocyte colony-stimulating factor, IL-6: interleukin-6