What do doctors not know about desmoid tumors?

Behavior/testing. There are a variety of tumors under this umbrella name. Some of them occur in young while others in older age groups. Some are frankly cancerous, others not. We are still learning better ways to diagnose, predict behavior and find better ways to treat some of the more aggressive ones and ones that occur in uncommon areas like the brain.
Vague question. Hi rory12. This is really a very vague question. Do you have a more specific question we could address?