Sánchez-Peńa P, Chávez-Mercado L, Chávez-Macías LG, Olvera-Rabiela JE

Language: Spanish
References: 15
Page: 146-150
PDF size: 254.08 Kb.

ABSTRACT

The inflammatory pseudotumor (IPT) is an benign lesion with well known histological features. They consist of proliferation of fibroblasts and myofibroblasts, mixed with a chronic inflammatory infiltrate which varies in amount, in a dense collagenous stroma. It is relatively rare in the central nervous system. The informed sites in the literature in decreasing order of frequency are supratentorial and infratentorial meninges, parenchyma of cerebral hemispheres and fourth ventricle. Cases with elevated serum globulins associated with polymiositis and Sjögren syndrome. There are also reports in the literature with expression of anaplastic lymphoma kinase (ALK). Abnormalities of the ALK and P80 genes are seen in cases of malignant transformation of low grade fibrohistiocytic tumor. In this report, a man of 53 years had an inflammatory pseudotumor of the left lateral ventricle of the central nervous system. The clinical diagnoses were neurocysticercosis and choroid plexus papilloma. The entity reported here should be included in the differential diagnosis of intraventricular tumors. Only seven cases of intraventricular inflammatory pseudotumor have been reported.

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