Cancer (disambiguation)

Cancer can mean:
 Cancer, the disease
 Cancer (constellation), the constellation
 Cancer (astrology), the astrological sign
 Tropic of Cancer, a major circle of latitude
 Cancer (genus), a genus of crab
 Cancer (band), a British death metal band
 "Cancer", a song by Joe Jackson on his 1982 album Night and Day.
 "Cancer", a song by Filter on their 1999 album Title of Record.
 "Cancer", a song by My Chemical Romance on their 2006 album The Black Parade.
 Cancer (mobile suit), a mecha in the Gundam Wing anime.
 Cancer (comics), a Marvel Comics character

See also:
 55 Cancri, a star system 40 light years away from Earth in which NASA has recently discovered five planets