In the TV series Hannibal, a prequel to Silence of the Lambs, Hannibal clearly has a normal set of digits.
But, in the book Hannibal, set after Silence of the Lambs, there is great discussion about Hannibal's polydactylism, i.e. an extra finger on his left hand, in terms of tracking him down.
Is there any explanation for the TV series diverging from the book?