CSPG4 and neoplasm: In tumour vessels, NG2/CSPG4 fragments co-localized with Coll IV at the VBM/pericyte interface, forming clearcut rims denoted as 'pericyte lacunae', restricted specific domains pertaining to shed fragments and never seen to be co-localized with pericyte-specific isoforms identified by mAb 2161F9.