Solitary intra-ventricular brain metastasis from a breast carcinoma.

Prevalence of symptomatic central nervous system (CNS) metastases among patients with breast cancer ranges from 5% to 16%, although autoptic studies have reported prevalence rates of up to 30%. Solid brain tumours are the most common presentation in the CNS (85-95%), and they tend to arise at the grey-white matter junction with a distribution that is proportional to the regional cerebral blood flow. Descriptions of solitary intra-ventricular metastasis are very rare; to date no cases from breast cancer have been reported in the literature. We present the unusual case of a breast cancer patient who developed a solitary choroid plexus metastasis in the left lateral ventricle.