Kancer is a fictional character

Fictional character

A character is the representation of a person in a narrative work of art . Derived from the ancient Greek word kharaktêr , the earliest use in English, in this sense, dates from the Restoration, although it became widely used after its appearance in Tom Jones in 1749. From this, the sense of...

, a supervillain

Supervillain

A supervillain or supervillainess is a variant of the villain character type, commonly found in comic books, action movies and science fiction in various media.They are sometimes used as foils to superheroes and other fictional heroes...

 in the DC Comics

DC Comics

DC Comics, Inc. is one of the largest and most successful companies operating in the market for American comic books and related media. It is the publishing unit of DC Entertainment a company of Warner Bros. Entertainment, which itself is owned by Time Warner...

 Superman

Superman

Superman is a fictional comic book superhero appearing in publications by DC Comics, widely considered to be an American cultural icon. Created by American writer Jerry Siegel and Canadian-born American artist Joe Shuster in 1932 while both were living in Cleveland, Ohio, and sold to Detective...

series. He first appeared in Action Comics

Action Comics

Action Comics is an American comic book series that introduced Superman, the first major superhero character as the term is popularly defined...

#777 (May 2001). He was created by General Zod

General Zod

General Zod is a fictional character who appears in comic books published by DC Comics, a supervillain who is one of Superman's more-prominent enemies. The character first appeared in Adventure Comics #283 , and was created by Robert Bernstein and George Papp...

 from kryptonite

Kryptonite

Kryptonite is a fictional material from the Superman mythos —the ore form of a radioactive element from Superman's home planet of Krypton. It is famous for being the ultimate physical weakness of Superman, and the word kryptonite has since become synonymous with an Achilles' heel —the one weakness...

-induced cancer

Cancer

Cancer , known medically as a malignant neoplasm, is a large group of different diseases, all involving unregulated cell growth. In cancer, cells divide and grow uncontrollably, forming malignant tumors, and invade nearby parts of the body. The cancer may also spread to more distant parts of the...

cells removed from Superman's body. A vaguely humanoid green mass encrusted with calcified or crystalline growths, his powers include super-strength, speed, stamina, invulnerability, flight, and the ability to dissolve and devour other organisms.