Janice Dickinson has been diagnosed with breast cancer ... but is vowing she will beat it just like so many other challenges she's faced.
The ex 'Top Model' judge revealed doctors found a pea-sized lump in her right breast during a routine medical exam, and immediately ordered a biopsy. She says the results came back positive on March 12.
Janice told the Daily Mail the cancer is in early stages, and believes ... just as she overcame anorexia and alcoholism, she'll triumph over cancer -- "Don't feel sorry for me. I'm gonna stick around for a long, long time."