Chunkosaur or fossil skull?

[Bone guy]

Found this fossil which the seller is claiming to be a chunk of skull from kem kem. Is it to far gone to be identified?

[LordTrilobite]

This seller often has great fossils, but very often they are also misidentified. This is a tough one. There don't seem to be any distinguishing features. But with so many cavities in the bone this can only be dinosaur. I'm not sure even Theropods have such open structures. I'd actually lean towards Sauropod, possibly some internal structure of a vertebra. But I really don't know for sure.

[Troodon]

It does not look like a skull element.  Olof might be on to something as being part of a Sauropod vert since most have lots of cavities to keep the weight down.  Interesting piece that would be nice to hold and examine it that way versus pictures.