Fourth ventricle choroid plexus papilloma

In childhood, choroid plexus papilloma CPPs are usually found in the lateral ventricles and less commonly in the posterior fossa. On the contrary, in adults, the majority of these tumors are found in the fourth ventricle and its lateral recesses 1).

A case of 72-year-old man with posterior fossa lesion operated with provisional diagnosis of metastasis, but turn out to be CPP 2).

Differential diagnosis

Medulloblastoma.

Atypical teratoid/rhabdoid tumor (AT/RT).

Ependymoma.

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1)
Lee SH, Park BJ, Kim EJ, Lim YJ. Atypical choroid plexus papilloma in an adult. J Korean Neurosurg Soc. 2009 Jul;46(1):74-6. doi: 10.3340/jkns.2009.46.1.74. Epub 2009 Jul 31. PubMed PMID: 19707500; PubMed Central PMCID: PMC2729831.
2)
Umredkar AA, Chhabra R, Bal A, Das A. Choroid plexus papilloma of the fourth ventricle in a septuagenarian. J Neurosci Rural Pract. 2012 Sep;3(3):402-4. doi: 10.4103/0976-3147.102643. PubMed PMID: 23189015; PubMed Central PMCID: PMC3505354.