Article topic: Pneumocephalus Author: Amera Sadder, Sadeel Suwan Editor: Hamzeh Aljarrah Reviewer: Rahmeh Adel keywords: Conservative treatment, Cushing triad, Mountain Fuji sign, Neurotrauma, Pneumocephalus. Introduction Pneumocephalus (intracerebral aerocele or pneumatocele) is a pathological collection of gas (mostly air) in the cranial cavity.1 The air may be within the ventricular cavities, brain parenchyma, subarachnoid, subdural or epidural space.2 It is classified into acute (less than 72 hours) or delay (more than 72 hours). Also, it can be classified as simple or tension pneumocephalus.3 Tension pneumocephalus is intracranial parallel to tension pneumthorax 4 and is defined as an unceasing accumulation of intracranial […]