Actor Irrfan Khan attends the premiere of his film "Puzzle" at the Sundance Film Festival in January.
Source:	C Flanigan/FilmMagic/Getty Image

Actor Irrfan Khan attends the premiere of his film "Puzzle" at the Sundance Film Festival in January.
Source: C Flanigan/FilmMagic/Getty Image

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'Life of Pi' star Irrfan Khan reveals he has a rare tumor

Bollywood star Irrfan Khan tweeted Friday that he has been diagnosed with a neuroendocrine tumor. Such rare tumors are "abnormal growths that begin in specialized cells called neuroendocrine cells," according to the Mayo Clinic. They can occur anywhere in the body and be both cancerous and benign.