Hi,
Has a brain scan been done?
You should discuss about the treatment plan in detail with your doctor.
Radiation therapy would be recommended - it is nice to know that he is doing well and taking the treatment well so far.
Let us know about what the doctor advises and post us if you have any other doubts.
Regards.
I'm sorry to hear about your best friend's father's diagnosis. I glad he seems to be doing well and tolerating the treatments so far.
There is always a possibility that the spot on his brain isn't cancer, but unfortunately, brain metastases are very common in patients with small cell lung cancer. Even if the spot isn't cancer, it's possible they might recommend doing prophylactic cranial irradiation to reduce the risk of brain metastases developing.
I'm not a doctor, but as far as I know, whole brain radiation therapy is the standard treatment for brain mets from sclc. Other possibilities for treatment are chemotherapy and gamma knife.