Copy number loss in is common among Finnish and Norwegian patients with iNPH.

Objective: To evaluate the role of the copy number loss in in a Caucasian population.

Methods: Five hundred sixty-seven Finnish and 377 Norwegian patients with idiopathic normal pressure hydrocephalus (iNPH) were genotyped and compared with 508 Finnish elderly, neurologically healthy controls. The copy number loss in intron 2 of was determined using quantitative PCR.