A CSF collection is a subcutaneous accumulation of cerebrospinal fluid that may occur following intracranial surgery. In this case, the Cerebrospinal fluid emerges subcutaneously through the craniotomy gap, where it accumulates.
Examination
A CSF collection can usually be readily palpated and feels very soft on palpation due to the cerebrospinal fluid.
Prevention
Watertight closure of the dura mater, as well as application of fibrin glue to the dural suture[^1], can significantly reduce the occurrence of CSF collections. The literature also describes performing a galea-to-cranium suture[^2] or an arachnoid suture[^3] as effective methods for reducing a CSF collection. If CSF leakage from the wound occurs, surgical revision should be considered.
Imaging
A CSF collection can be diagnosed by clinical examination and visualized on CT or MRI.
