BACKGROUND The pigmented or melanotic variant of choroid plexus carcinoma is very rarely encountered. CASE REPORT We report herein a case of melanotic or pigmented choroid plexus carcinoma in the posterior fossa of an 11-year-old female. CONCLUSIONS A histopathological study supported by immunohistochemistry helped the authors to diagnose this rare entity. How to differentiate this tumor fr...

This case report describes clinical, surgical, MR, and pathologic findings of an intraventricular fibroma, a rare, benign mesenchymal neoplasm. Relatively isointense with normal brain parenchyma on T1-weighted images, the tumor exhibited hyperintense signal on T2-weighted pulse sequences and enhanced intensely and homogeneously after intravenous administration of gadopentetate dimeglumine. Chor...

Ependymomas are well-delineated moderately cellular gliomas. Histolological features are perivascular pseudo rosettes and ependymal rosettes. WHO classification differentiate four major types: 1. Ependymoma and variants (grade II): Cellular ependymoma: a variant of ependymoma with conspicuous cellularity but often less prominent pseudo-rosette or rosette formation. Papillary ependymoma: a rare ...

The present essay is illustrated with magnetic resonance images obtained at the authors' institution over the past 15 years and discusses the main imaging findings of intraventricular tumor-like lesions (ependymoma, pilocytic astrocytoma, central neurocytoma, ganglioglioma, choroid plexus papilloma, primitive neuroectodermal tumors, meningioma, epidermoid tumor). Such lesions represent a subgro...

Tumors of the choroid plexus are rare neoplasms of neuroectodermal origin, accounting for less than 1% of all intracranial tumors. These tumors are primarily found in children, but they can be observed as well as in adults , infants and prenatal occurrence has been reported.1 In children, tumors of the choroid plexus are located most often in the lateral ventricle, but they can also be found in...

BACKGROUND Choroid plexus tumors are rare. Results on immunohistochemical features are scanty and controversial even regarding normal plexus. METHOD Thirteen cases of choroid plexus tumors and five samples of normal fetal choroid plexus were submitted to immunohistochemical study using a panel of epithelial, neuronal and stromal markers. RESULTS/CONCLUSIONS Relevant histological findings we...

Brain tumors arising in the neonatal period are rare and diagnosis is usually delayed. We encountered a case of choroid plexus papilloma (CPP) in a term newborn infant. The sonographic findings of this case demonstrated a striking similarity to intraventricular hemorrhage, an entity commonly seen in premature infants. A preoperative diagnosis was made, however, with the application of the pulse...