It's no Terms of Endearment, but 50/50 handles possibility of cancer death withrealistic humor
Terminal illnesses haunt films like sharks in figurative waters. Without even the fair warning of a foreshadowing fin above the surface, they appear suddenly at two-thirds mark of maudlin, weepy melodramas and snatch lives away.
Death isn't something that teaches us lessons, or arrives at the most dramatic time possible, it's just something we put off having to deal with until we have to. If you're going to rob a character of the time and detail to do so by reducing them to a plot device, they may as well just be shark fodder.