I believe the best way to describe this partly autobiographical story is as an illness travelogue. Alexie prepares his reader for a strange journey by making the first stop his discovery of a dead cockroach in his suitcase. This allusion to The Metamorphosis works wonderfully well for the Kafkaesque remainder of the journey.  His bodily journey moves from loss of hearing to possible meningioma to his doctor's proclamation that his "brain is beautiful." His existential/psychological/cultural journey, triggered by his bodily suffering, moves in multiple directions: to time spent with his dying father, his own experience with hydrocephalus, his grandfather's death in WWII, and his loving relationships with his children, wife and brother-in-law.