Cerebrospinal fluid leak

A cerebrospinal fluid leak occurs when a tear or hole happens in the dura mater, the outermost membrane enveloping the brain and spinal cord.

Causes
Leaks can occur after lumbar punctures, epidurals, and surgery. They can also happen spontaneously. Risk factors for spontaneous (idiopathic) leaks as well as leaks following procedures include connective tissue disorders such as Ehlers-Danlos syndrome.