Old man with a lung mass 3 cm.

Radiologist did CT-guided FNA and I did on site evaluation this afternoon. I called malignant cells based on above one DQ. The procedure was stopped because patient had bleeding and also I think I should have enough cells for a cell block. Cytopathologists are required to give diagnosis (at least malignant, atypical, benign) on site in our institute if it is possible.

In fact I really do not know what kinds of tumor for this case. I have not seen the Pap stain yet. I have my differential dx and ordered some IHC already.

Hope people who see this case write down your differential dx and IHC.

When I have IHC results I will put here.