You can go to
http://dying.about.com/caregivers But here are a few things to know.Everyone is different you have to realize.
. withdrawals from social activities and spends more time alone.
.speaks of tying up loose ends
.may show a desire to speak to family, freinds and make amends or catch-up.
.increased restlessness, confused can't get comfortable.
.loss of interest in daily activities.
.can't heal of infections or etc.
loss of interest in eating and drinking.
.longer periods of sleep or inactivty.
.speak of dying or ask questions.
.may see people who passed on.
edema:swelling
.apnea: awake or asleep.breath real slow or real fast.
The above can last for weeks or monthes
The followingwell last for only a few days to a couple of weeks.
--fluid builds up in lungs, congested,longer periods of apenea.and abnormal breathing patterns such as slow then fast.
--He may state they are dying soon.
--difficulties swallowing liquids or the resistence of food and drink.
--marked changes in personalitiy, acting wildly, servere agitation, hallicinations.
--increased difficulty waking them from sleep, the inabilty to arouse them at all, or a comma-like-state.
--subject is unresponsive or can't speak.
--does not move for long periods of time.
--legs, feet, arms,hands give a blueish or purplish color,splotchy appearance.
--decrease urinenation with urine darkining in color or changing color.
---drop of blood pressure to 20 to 30 below normal like top 70 and bottom 50
---loss hearing, feeling, smell, taste, sight--final stage
Hope this helps. Your love one won't have all but this are things to watch for. Also when the legs turn splotchy blue that is a for certain sign they are pasting away. With cancer their body has to shut down. One organ at a time.