"Choroid plexus xanthogranulomata are common, incidental and almost invariably asymptomatic lesions. It is unclear in much of the literature whether they represent a distinct entity from adult choroid plexus cysts, but they share imaging characteristics and are only likely to be distinguishable on autopsy. As the clinical history is the same, the distinction, at least from a radiologist's and clinician's point of view, is largely irrelevant."
"Signal characteristics on MRI are variable depending on the mixture of lipid, fluid and blood products. In general, they mimic cystic lesions, although they do not fully attenuate on FLAIR. A helpful feature is that they usually have a quite high signal on diffusion-weighted imaging (DWI). This high signal is seen as a result of both true restricted diffusion and T2 shine through (as expected the ADC signal is intermediate rather than particularly low) 5."
"These lesions represent desquamated epithelium into the lumen of choroid cysts within the choroid plexus. As a result, the cholesterol/lipid-rich content of epithelial cells accumulates, sometimes combined with blood products, and results in a xanthomatous response, as this material is ingested by mononuclear cells 1,2,5."