Hydrocephalus caused by unilateral foramen of Monro obstruction: A review on terminology.

Background: Hydrocephalus caused by unilateral foramen of Monro (FM) obstruction has been referred to in literature by many different terminologies. Precise terminology describing hydrocephalus confined to just one lateral ventricle has a very important prognostic value and determines whether or not the patient can be shunt free after an endoscopic procedure.

Methods: Aiming to define the best term for unilateral FM obstruction, 19 terms were employed on PubMed database (http://www.