Platelet-derived growth factor-C (PDGF-C) and its tyrosine kinase receptor PDGFRɑ have been shown to contribute to several key processes during central nervous system (CNS) development, including normal vascularization and formation of cerebral ventricles and basal membrane of the meninges. Due to redundancy between PDGF-C and PDGF-A, PDGF-C specific roles are sometimes masked and difficult to determine. Using the double mutant    Pdgfc-/-;PdgfraGFP/+ mouse (Mus musculus) strain we were able to detect and examine a new, undescribed phenotype of PDGF-C impaired mice, namely cerebellar malformations. These mutant mice displayed an upwards rotation of the cerebellar vermis with a severe posterior vermis hypoplasia and an enlarged fourth ventricle, suggesting PDGF-C/PDGFRɑ signaling as a novel candidate to induce Dandy-Walker malformation (DWM). Due to suspected cerebellar vascular malformation a quantification of diameter, density and number of vessels were performed. A significant increase (P < 0.05) of the number and density of vascular bed in the cerebellar nuclei was detected, however the vessel diameter was not significantly different (P > 0.05) in Pdgfc-/-;PdgfraGFP/+ mice in comparison with the control. Through immunofluorescence staining we detected discontinuation of the ependyma in the acute angle of the ventricular zone adjacent to the rhombic lip, interfacing the fourth ventricle and cerebellar anlagen. We further noted ectopic expression of rhombic lip derived cells in the ventricular zone, suggesting a misguided migration due to ablation of PDGF-C. We conclude that PDGF-C is an essential player in normal cerebellar development.