Choroid plexus tumours on MRI: similarities and distinctions in different grades

The CPTs with typical papillary/lobulated/irregular internal morphology. The CPPs with papillary internal morphology (a. T2WI, b. T1WI, c. post-contrast). In the pathology image of case b, the tumour cells are arranged in a papillary structure with vascular at the centre (d). The CPC (e. FLAIR) and aCPPs (f, g. post-contrast) with lobulated internal morphology. In the pathology image of case e, the tumour cells are arranged closely, with focal necrosis and haemorrhage (h). The CPCs with irregular internal morphology (i. FLAIR, j. T2WI, k. post-contrast). In the pathology image of case i, the papillary structure is irregular and complex, and the distribution of tumour cells is dense (l