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OTRC: Ethan Zohn finishes the New York City marathon

Ethan Zohn attends the Gabrielle's Angel Foundation for Cancer Research 'Angel Ball' honors gala at Cipriani's Wall St. on Monday, Oct. 17, 2011 in New York. (Evan Agostini)

Despite announcing the news earlier this week that his cancer returned, former "Survivor" contestant Ethan Zohn ran and finished the New York City marathon on Sunday, November 6.

"26.2 in the bag. NYC marathon finished. Lots of rest. Lots of Muscle Milk. Hopefully can walk tomorrow," Zohn, 37, Tweeted, adding that he finished the race in four hours and 20 minutes. "Everyone who was supporting me and GRS gave me the strength to finish! THANK YOU."

He ran the marathon to raise money for Grassroot Soccer, an organization he co-founded, whose goal is to "mobilize the global soccer community to combat the AIDS epidemic in Africa."

The former reality star, who won "Survivor: Africa," found out on September 14 that his cancer had returned. Zohn, who is often considered one of the most-liked "Survivor" contestants, was in his 20th month of remission from Hodgkin's lymphoma when he heard the news.

"I don't want fear or cancer to define me, but it's always in the back of your mind," Zohn told People magazine in a recent interview. "It's localized in my lung area... But it's good that it's not all over my body."

The former reality star has begun treatment for the cancer, using a new form of chemotherapy called SGN-35, which specifically targets cancer cells. After three months of chemotherapy treatment, Zohn told People that he will undergo another stem-cell transplant from one of his brothers.

"But the doctors won't tell me which one. They didn't want me to start treating one differently than the other," Zohn told People magazine recently. "Of course my whole family is taking bets on who it is."

Zohn rose to fame after appearing on "Survivor: Africa," the third season of the reality series. He also appeared on the All-Stars edition of the show. After winning $1 million on the series, the Massachusetts native started Grassroot Soccer.

He was first diagnosed with the rare CD20-positive Hodgkin's lymphoma in April 2009 and started chemotherapy the following month. After three months of chemotherapy, his cancer returned in September 2009, but following a stem-cell transplant, he received a clean CT scan in April 2010.

Zohn began dating Morasca following her victory on "Survivor: The Amazon" in 2003. The couple participated in the 19th season of "The Amazing Race," but were eliminated in the second episode, which aired on October 2, 2011.

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