solipsism (noun) - the theory that the self is all that exists or that can be proven to exist; extreme self-absorption or egocentrism [sol-ip-siz-uhm]
BREAKDOWN: SOL- (alone) + IPS- (self) + -ISM (practice or belief)
solipsistic means of, pertaining to, or characterized by solipsism; self-centered or egocentric
“There is a certain solipsism to serious illness which claims all of one's attention as certainly as an astronomical black hole seizes anything unlucky enough to fall within its critical radius.” —Dan Simmons