Microsoft co-founder Paul Allen has been diagnosed with cancer, according to a memo sent on Monday to employees of Vulcan, Allen's company.
Allen, who is a survivor of Hodgkin's disease, has been diagnosed with non-Hodgkin's lymphoma, according to Vulcan CEO Jody Allen, who is also Paul Allen's sister.
Fellow Microsoft co-founder Bill Gates said he and his wife, Melinda, were keeping Allen in their thoughts.
"Melinda and I have Paul and his family in our thoughts and prayers," Gates said in a statement. "Paul is among my closest friends, and I know to him be a strong and resilient individual."
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