Hi dear, see first of all whether to treat or not, it depends on age, type of tumour, stage, and general condition of the patient. We can cure early stage lung cancer
and control stage 4 with the help of chemotherapy
. We have options of tablets to control certain type of tumour, which also helps in maintaining good quality of life of the patient. So chemo is not always bad. But allowing the loved one to die without treatment can leave long term bad memories. Take care.