Fig. 5
From: Post-traumatic tension pneumocephalus and cystic angiomatosis of the skull: case report
A, B Operative findings: collapsed pneumatocele after incision of periosteum, trabeculae connecting defective bone (red arrows) with scalp and cribriform like multiple bony defects (green arrows). C Craniotomy with removed lytic skull bones and a dissector being passed from extradural space via a canal “red arrow” to communicate with the mastoid defect in D, green arrow points to the dura and yellow arrow points to the nipped off lytic bone. D Cortical Mastoidectomy of left ear, well circumscribed regular bony defect (red arrow) of inner table of sinudural angle communicating with the extradural space, zygomatic arch is shown by green arrow