Intracranial arachnoid cyst rupture after mild TBI in children: have we underestimated this risk?

The association between intracranial arachnoid cyst rupture and mild brain trauma is infrequently reported. The purpose of this case report is to describe the case of a child with a left temporal arachnoid cyst who suffered rupture with haemorrhage after mild trauma during a football match. The child presented with chronic headache of mild intensity that progressed to a more intense headache after a traumatic event. He underwent surgical intervention after diagnosis of chronic haemorrhage in an arachnoid cyst in the ipsilateral subdural space. The risk of intracranial arachnoid cyst rupture should be considered during the evaluation of oligosymptomatic patients because it is a potentially catastrophic event.

Subdural haemorrhage secondary to arachnoid cyst rupture from scuba diving

We describe a case of intracranial arachnoid cyst rupture leading to ipsilateral subacute subdural haemorrhage secondary to scuba diving in a previously healthy adult male. Our patient required urgent trephination of the cranium to evacuate the subdural haemorrhage and recovered well post operatively. To our knowledge this is the first case reported in the literature of arachnoid cyst rupture with concomitant subdural haemorrhage from scuba diving. This case may have implications for information provided to patients with arachnoid cysts.