Since being diagnosed with stage iii adenocarcinoma of the lung (inoperable) my 78 y old dad (fit and trim to start with) has lost 21 lb in weight. He's had 3 cycles of chemo, 2 radiotherapy treatments and now they're just monitoring as no more can be done. He recently has developed pain in his right arm, and as he's already on strong painkillers, this seems ominous. He lives alone, is fiercely independent, how bad is this?I know each person's experience is different, but has anyone info they could share to let me know what to expect? Naturally i've trawled the net, but while there is a wealth of info on diagnosis, chemo, etc., there appears to be little about what course the disease takes as it approaches terminal, like what might it be helpful to know, how can you tell if there are secondaries, etc. Thanks for reading this.