A lie refers to a sentence or some words that the speaker considers to be true (he may not know the truth of the matter) as untrue to the listener, making the listener believe that the non-existent thing exists , or say that things that really exist are non-existent.
a lie?
Xiao Zhang was diagnosed with cancer. He didn't tell his family. After actively adjusting his work, rest and life, his body recovered and the focus disappeared. At this time, he told his family that he had been away from cancer.