"Cancer" is the eighth track from My Chemical Romance's 2006 album, The Black Parade. Many fans consider this a solemn song because it has a very peaceful melody compared to a song like "Famous Last Words".
The Black Parade takes listeners on a journey through the death of a man dubbed “The Patient.” This track reveals the driving force behind the protagonist’s death — cancer. It expresses his agony, just asking to be told the truth.
In an interview with NME Gerard Way spoke about the tragic, bleak tone of the song.
“Speaking about the track ’Cancer’ in a statement, Way said that he wanted to write “the darkest song ever.”
“It’s not a poetic track,” he said. “It’s very direct, very brutal, but that’s the way disease is. Obviously cancer is being used as a metaphor.
“But I also wanted the song to be directly about the disease, because it’s something that the patient has gone through and it’s a very powerful thing. For me it was almost like an attempt to write the darkest song ever, and I think we achieved that."