The 41-year-old Canadian musician and wife Luisana Lopilato, who had announced last November that Noah was undergoing treatment for the disease in the US, confirmed about this development to E! online.
"We are so grateful to report that our son Noah has been progressing well during his treatment and the doctors are very optimistic about the future for our little boy," the couple said in a statement.
They added that their son has been brave and they are "inspired by his courage".
The couple married in 2011 and also have a one-year-old son, Elias.
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