The author suggests (amongst other things) that anger suppression can lead to cancer cells not being dealt with by the body as they would normally otherwise be. The evidence is anecdotal, but then it perhaps quite unlikely that we will see clinical studies along these lines any time soon unfortunately.
https://www.goodreads.com/book/show/450534.When_the_Body_Say...
The author suggests (amongst other things) that anger suppression can lead to cancer cells not being dealt with by the body as they would normally otherwise be. The evidence is anecdotal, but then it perhaps quite unlikely that we will see clinical studies along these lines any time soon unfortunately.