Solitary metastasis to the choroid plexus of the lateral ventricle. Report of three cases and a review of the literature.

Three cases of cancer metastasis to the choroid plexus of the lateral ventricle are reported. The metastases were from sigmoid colon cancer, renal cell carcinoma and pulmonary cancer, and were located in the trigone in two cases and the right inferior horn in one. Total removal was accomplished in all cases without any complications. In addition, eight reported cases of single brain metastasis to the choroid plexus of the lateral ventricle, including clinical and radiological features, are discussed. Peritumoral edema on computed tomographic (CT) scan or magnetic resonance (MR) imagining was found to be an important feature of metastasis developing at this site.