In simple words: The surgeon removes a section of the skull to access and remove a pus-filled infection (abscess) in the upper part of the brain. The skull bone is then replaced.

This procedure involves removing a portion of the skull bone (craniectomy, trephination, or bone flap craniotomy) to excise a brain abscess located above the tentorium cerebelli. The surgeon makes an incision in the scalp, removes a circular piece of bone, excises the abscess, drains any excess fluid or blood, sutures the tissue layers, reattaches the bone flap, and dresses the wound.

Example 1: A patient presents with a supratentorial brain abscess confirmed by imaging. A craniotomy is performed to excise the abscess., A patient with a bacterial infection develops a supratentorial brain abscess. The abscess is surgically excised via a craniectomy., Following head trauma, a patient develops a supratentorial abscess. A bone flap craniotomy is performed to remove the abscess.

Documentation should include the location and size of the abscess, the operative approach, any complications, and confirmation of the supratentorial location.