PRDX2 and Ventriculomegaly: It primarily serves as a proof-of-concept study that identifies alterations in ChP immune cells (macrophages, lymphocytes and neutrophils) following IVH and intraventricular injection of blood components (iron and Prx-2), as well as the associated inflammatory responses in PHH and iron/Prx-2-induced acute (24 h) ventriculomegaly.