Hi, my father (68 years old) has been diagnosis with nsclc with plural effusion on his left lung on march 2016. There is a 4cm tumor on the upper lobe and metastasis to plural and also lymph node. Since April 2016, doctor drain the fluid and suggested carboplatin + taxol, just three week after first cycle (when we go for 2nd cycle), the fluid build up covering 70% of his left lung. Immediately doctor drain his fluid again and applied bleomycin, doctor decided carboplatin doesn't work, so my dad started cisplatin + gemcitabin. My dad manage to finish all 4 cycle, and did a CT scan on august 2016. Result shows the fluid maintain at 20%, tumor shrunk about 1cm+ (2cm++ now). Doctor mention cisplatin + gemcitabin has done its job well. Doctor now suggest to stop at 4th cycle due to the toxicity that my dad might not be able to tolerate if we give two more cycle.
My question is should we go for 2 more cycle of gem+cis or is it an option to stop treatment now?
Through research we found that there is this new drug call pembrolizumab, my dad have done the test and it shows 50% positive. Can I check if this new drug will be able to cure my father. This is rather expensive drug we need advise on this drug.
As of now, should we go for maintenance treatment or its an option to stop treatment for now and monitor?
Please help to advise as we are now have no direction, my father has stop chemotherapy for a month now. We worry day by day when it will relapse or further spread. Please let me know if I didn't point out my question clear and I apologize for my poor english. Thanks in advance for all advise.