Vegas Golden Knights defenseman Shea Theodore revealed Thursday in an article on The Players' Tribune that he was diagnosed with testicular cancer during the offseason.

In an entry titled "To My Golden Knights Family," the 24-year-old revealed he had surgery to remove the affected area and has made a full recovery. He will, however, continue to be monitored closely.

Theodore's cancer was discovered when he took a drug test while playing for Canada at the World Championship in May.

Before the quarterfinal game, the British Columbia native was informed that he failed his test due to the discovery of a hormone called hCG, which is typically found in pregnant women. Doctors told him, though, that it can also be a sign of testicular cancer.

Theodore returned home following the tournament to see his doctor and officially received the diagnosis.

After sharing the news privately, Theodore received support from family and friends, including fellow NHLer Phil Kessel, who faced his own battle with testicular cancer in 2006.

Theodore is entering his fifth NHL season and third with the Golden Knights. He didn't reveal whether he will have to miss any time but is currently included on Vegas' training camp roster.

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