Radiology - in sclc is the primary tumor normally difficult to see on a ct scan? heard that often only spread to nodes can be seen. pet scan better?

Small Cell Lung Ca: SCLC does metastasize early, often to nodes, which are often the presenting finding. Usu. the primary tumor is small even though symptoms have occurred. CT has very high resolution so it has the best chance to find it, esp. if pt. has been followed with serial screening CTs based on risk factors like smoking history. PET is useful to find mets, but not a small primary.