J Korean Neurosurg Soc.  2009 Feb;45(2):99-102. 10.3340/jkns.2009.45.2.99.

Inflammatory Pseudotumor in the Lateral Ventricle with Repeated Bleeding: Case Report

• Park JH
• Nam TK
• Hwang SN
• Park SW

• KMID: 1466327
• DOI: http://doi.org/10.3340/jkns.2009.45.2.99

Abstract

Inflammatory pseudotumor is an uncommon lesion with unknown etiology characterized by sclerosing inflammation which clinically and radiographically mimics a neoplastic lesion. A 47-year-old man presented with sudden headache and dysarthria. Brain CT scan revealed a 2.6x2.2 cm sized, round, and hyperdense mass in the anterolateral wall of the left lateral ventricular trigone. On MR imaging studies, the mass showed low signal intensity in the wall of the trigone on T2-weighted image, central mixed (iso- and high-) signal intensity with peripheral low-signal intensity on T1-weighted image. Subtle staining of left choroid plexus with irregular shaped distal branch of anterior choroidal artery was found on the cerebral angiography. These findings suggested a small tumorous lesion originated from the left choroid plexus. During the hospital days, the mass manifested as repeated hemorrhages. The mass was successfully removed via left occipital transcortical approach. The histopathological report of the specimen was hemorrhage and fibrosis, with dense lymphoplasma cell infiltration, suggestive of an inflammatory pseudotumor.

Keyword

Intraventricular tumor; Inflammatory pseudotumor; Hemorrhage

MeSH Terms

Arteries
Brain
Cerebral Angiography
Choroid
Choroid Plexus
Dysarthria
Fibrosis
Granuloma, Plasma Cell
Headache
Hemorrhage
Humans
Inflammation
Lateral Ventricles
Middle Aged