My Chemical Romance‘s “Cancer” is the most searched official score for the band on MuseScore, a remarkable run for a song that barely clears two minutes and was never pushed as a single. Frankly, I thought “Welcome to The Black Parade” would be the most searched here. The song sits on “The Black Parade”, the 2006 concept album Rolling Stone called one of the best rock records of that year. The song is pivotal to the storyline of the album – it’s the moment where the record finally names the illness killing its narrator.
The Patient
https://youtu.be/wc2s9skF_58?si=S_s_vsuOP_47JZUh
“The Black Parade” follows a character known only as the Patient, a man dying of cancer. Gerard Way built the story on the idea that death arrives in the form of a person’s strongest memory. For the Patient, as Paste recounted, that memory is a childhood day when his father took him to see a marching band. The parade gives the album its title and its funeral-march pageantry.
Rolling Stone’s 2006 profile noted that the band made the record with producer Rob Cavallo, who had just finished Green Day‘s “American Idiot”, while holed up in a Los Angeles building rumored to be haunted. The magazine pointed to Pink Floyd‘s “The Wall” and Queen‘s “A Night at the Opera” as touchstones.
The album opens with “The End.,” which introduces the Patient in decline. By the time “Cancer” arrives in the running order, the listener has come through the title track’s marching-band epic and the snarl of “House of Wolves.” Then the band pulls back to piano and Way’s voice. “Mama” follows directly after and throws the album back into full theatrical mode.
In a statement to NME a week before the album’s October 23, 2006 release, he said he had set out to write “the darkest song ever.” He called the track blunt by design. “It’s very direct, very brutal, but that’s the way disease is,” Way said, adding that although cancer worked as a metaphor, he also wanted the song to be literally about what the Patient was going through.
The lyric follows through on that. The Patient catalogs what treatment has done to his body, counts down his remaining days, tells someone he loves that he won’t kiss them goodbye, and admits in the chorus that leaving them is the worst part of dying.
Written in Eight Minutes
Frank Iero told biographer Tom Bryant, for the book “Not the Life It Seems: The True Lives of My Chemical Romance”, that Way covered the walls of his room with hand-painted song titles during the writing sessions. One large sheet simply read “Cancer.” Iero said he worried his bandmate was getting too deep into it, according to Loudwire’s summary of the book.
Cavallo told Bryant that Way pulled him over to the piano and started singing, calling out the chords he wanted as he went. “He sang, I played the piano and it was written,” Cavallo said. By his estimate, the writing took about eight minutes, and they tracked it when the engineer showed up half an hour later.
Inside the Score
The official arrangement is in E major at 70 BPM with the performance marking “Grandly.” It opens with four bars that alternate between E and B while the left hand rolls a dotted bass figure beneath steady right-hand chords.
The verse moves E, B, C♯m, and then A minor. In E major, the expected IV chord is A major. Swapping in A minor borrows the chord from the parallel key of E minor, and its C natural lands a half step below the C♯ heard one bar earlier. That falling semitone gives the verse its sinking feel.
Heading into the chorus, the bass climbs chromatically from A through A♯, B, and B♯ before landing on C♯. Two slash chords make that possible. F♯/A♯ is the secondary dominant of B with its third in the bass, and G♯/B♯ does the same job for C♯m. Pianists should keep those bass notes clean and slightly forward in the left hand, since that rising line carries the whole build. The chorus then resolves with a textbook ii-V-I, moving through F♯m and B into E under the Patient’s confession about leaving.
The last page adds chromatic motion in both directions. Measure 33 steps from E to Eaug before settling on C♯m, which pushes the chord’s fifth up from B to B♯ and then C♯, starting at measure 39, the bass heads the opposite way through C♯m, Caug, E/B, and A♯dim. It’s a descending line cliché, and the Caug there works as a C♯m with B♯ in the bass. The passage resolves through F♯m and B to a final E chord held under a fermata.
Afterlife
Loudwire notes that the band chose “Cancer” as one of two songs for their Saturday Night Live appearance while promoting the album, and that it has gone gold in the U.S. without a single campaign behind it. In 2016, Twenty One Pilots recorded their own version for Rock Sound’s tenth-anniversary tribute album. Rolling Stone wrote that the duo kept close to the original’s mood while trading the piano for synths and layered vocals.
The song is now back in front of stadium crowds. My Chemical Romance have been playing “The Black Parade” in full on the Long Live the Black Parade tour, which The Line of Best Fit framed as a 20th anniversary celebration that included three sold-out nights at Wembley Stadium. At the band’s 2025 MetLife Stadium homecoming, Rolling Stone reported that fans lit the venue in red and white during “Cancer.” I flew down to Florida early this spring to see the band perform the piece, and I can attest that their live show delivers “The Black Parade” in an incredibly entertaining way.
