Intraventricular metastases are a very rare finding. A few intracranial tumours and some extracranial tumours metastasize to the ventricles. The most common site of intraventricular metastasis is trigone of lateral ventricles due to a high vascular supply of choroid plexus. Next common sites are 4th and 3rd ventricles.
This article will discuss metastatic lesions affecting only the cerebral ventricles. For other intracranial metastatic locations, please refer to the main article on intracranial metastases.
- renal cell carcinoma - most common primary
- breast carcinoma
- lung carcinoma - overall most common metastasis in the choroid plexus (as it is the most common tumour)
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