Pneumocephalus after epidural injection: A rare complication of a common procedure

Our patient with prolapsed intervertebral disc at L3–L4 was given lumbar epidural steroid injection using loss of resistance to air technique with 3 ml of air. After 5–6 h, she developed severe frontal and temporal headache with few episodes of nonprojectile vomiting, followed by disorientation and agitation. An urgent magnetic resonance imaging was done which revealed pneumocephalus