Unusual case of extradural choroid plexus papilloma of the sacral canal

Abstract

<jats:p content-type="fine-print">✓ An unusual case of a sacral, extradural choroid plexus papilloma involving the S1–3 level is described. This 50-year-old woman presented with a 4-month history of pain involving her right buttock, perineum, and leg. Contrast-enhanced magnetic resonance (MR) imaging of the spine revealed a well-defined, mildly enhancing sacral canal mass at the S1–3 level; its appearance was consistent with that of a benign tumor. Intraoperatively, the lesion was found to be extradural in location and was entwined among nerve roots in the sacral canal. Microscopic examination of the gross totally resected tumor revealed typical features of a choroid plexus papilloma. Despite performing a thorough neuroimaging workup (craniospinal contrast-enhanced MR imaging) for an intracranial or spinal primary mass, none was found. The choroid plexus appeared entirely normal; however, both a cavum septum pellucidum and a cavum vergae were noted. Extraneural choroid plexus papilloma, specifically intrasacral, extradural choroid plexus papilloma has not been previously reported. The present example is thought to have arisen either from ectopic choroid plexus tissue or perhaps by metaplasia from ependymal rests.</jats:p>

Choroid Plexus Papilloma Originating in the Sella Turcica -Case Report-

“…Pediatric cases tend to occur in the lateral ventricles, whereas adult cases tend to occur in the fourth ventricle. More unusual locations include the posterior fossa, 2,7) cerebellopontine angle, 3,20) brain stem, 18) third ventricle, 16,17) sacral canal, 12) and suprasellar region. 11) Only one case has been reported in the sellar region.…”

Spinal deposits of a benign choroid plexus papilloma

“…These theories do not explain a reported case by Kurtkaya-Yapicier et al 10 of an extradural CPP in the sacral spinal canal which led the authors to suggest that it may have arisen from ectopic choroid plexus or metaplasia of an ependymal rest. Interestingly, Dwarkanath et al 11 reported a patient with ectopic, histologically normal choroid plexus in the spine.…”

Ectopic presacral choroid plexus cyst in a neonate

“…These include arachnoid cyst of the cerebellopontine angle [1], intracerebral supratentorial cyst [5], and oropharyngeal cyst of a neonate [4]. The embryologic basis of this ectopic tissue is thought to have arisen either from anomalous migration of choroid plexus tissue or by metaplasia from ependymal rests [3].…”