Lung Cancer Metastasis To Stomach

Hi, my question has to do with my father in law who has just been diagnosed with lung cancer with metastasis to the stomach.  He had prostate cancer about 2 years ago, was treated with radiation, and went into remission.  Now he has stomach & lung cancers.  My question is whether a possible treatment would be removal of his stomach and the affected lung.  Would surgery to remove his stomach (all or a portion of it) and a lung be an option for treatment?  He's 70 and I don't think he'll be able to tolerate chemo and I don't know whether he can have any more radiation. Thanks