After succeeding in removing complex tumors from three Vietnamese patients including the man with a 200lb (90kg) tumor in early 2012, American doctor McKay McKinnon and his wife came back to Vietnam on July 20 to go on another marathon surgical mission

After succeeding in removing complex tumors from three Vietnamese patients including the man with a 200lb (90kg) tumor in early 2012, American doctor McKay McKinnon and his wife came back to Vietnam on July 20 to go on another marathon surgical mission.

