What is mastoid ecchymosis?

I am a dental hygienist and we see ecchymosis in the mouth, usually on the upper hard and soft palate, it is caused by sexual abuse. Usually caused by something forced in the mouth.

left mastoids are seen soleroti.deformed left pinna with blind ending external auditory canal and abscent left middle ear cavity and ossicles.it is cureble or not.

I'm just back from the doctors having been told I've an infection in my mastoid sinus, so yes.

The mastoid is a part of the side (temporal bone) of the skull.

The mastoid has been described as resembling a "honeycomb" of tiny partitioned-off airspaces.