Lung cancer is the cause of half of all brain metastasis. Which of the following is true

Q. Lung cancer is the cause of half of all brain metastasis. Which of the following is true

A.            For patients with a single brain metastasis, surgery or radiosurgery , either with or without WBRT

B.            Patients with one to three brain metastases may be treated with radio surgery alone, WBRT, or both

C.            Patients with more than five brain metastases, good PS, and limited extracranial disease, the role of WBRT versus SRS is ill-defined

D.            All of the above

Answer: all of the above