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Untreated tension pneumoventricle leading to progressive encephalomalacia: a rare case report with review of literature.

Tension pneumoventricle is a rare but potentially life threatening condition affecting the central nervous system.The majority of the reported cases are iatrogenic, seen after surgery for posterior fossa tumours, particularly in sitting position and pituitary and skull base tumours.Tension pneumoventricle following head injury is very rare with only seven reported cases till date. We report a case of untreated tension pneumoventricle, resulting from head injury due to road traffic accident leading to encephalomalacia of both the frontal lobes.