Atypical syncope during plasma donation as the first manifestation of an obstructive hydrocephalus.

This is the authors' abstract. We don't add key points for this paper.

A severe convulsive reaction during plasma donation was the first clinical clue to an obstructive hydrocephalus caused by a third-ventricle colloid cyst, illustrating that atypical donation reactions may unmask serious, previously silent intracranial disease.