TL;DR mouse model cautions keto when your melanoma tumor is a BRAF V600E-expressing melanoma. Always talk to your oncologist about this kind of dietary control and keep up on the science!
Note that this study focused on a cancer, specifically BRAF V600E-expressing melanoma mutant-dependent MEK1 activation in human cancers for those of us spilling ketones. The ketone in question here is acetoacetate.
This is a murine (mouse) model study and the science is behind a paywall. The study calls for a fine-tuned diet in order to keep these kinds of tumors from growing quickly.
So, for those of us Ketonians who are cancer survivors (Stage III-C Colon here, unknown whether I had the mutation mentioned above), there is a new study which cautions against Keto when a specific mutation is present in your tumor.