He has an obstinate personality and rarely changes his mind once he has made a decision.

His obstinacy is recognized by everyone.

His discernment is very sharp, he doesn't miss any details.

A surprised expression was on his face.

This is a fake painting.

He is receiving treatment for carcinoma.

He was diagnosed with adenocarcinoma.

He was diagnosed with liver cancer.

This area is rich in breccia.

This mountain is made of phonolite.