Cherubism is a medical condition where bone is replaced with fibrous tissue resulting in bone growth.  This can result in enlarged bones such as the jaw.  Cherubism shows that the key to inducing neo-height growth may be osteoclastic activity which is what permits the growth.

<-Robert Z’dar had cherubism.

This enlargement seems to occur without growth plates and seems to be a result of osteoclastic, fibroblastic, and cystic activities.

Even more interesting cherubism can occur in an adult.

Recurrent cherubism in an adult patient.<-I can’t get this study right now I’ll have to get it later.

Here’s an image of the osteoclastic cells in cherubism:

from Cherubism: best clinical practice.  According to this study the lesions are fibro-osseous and occur until puberty.