Choroid plexus papilloma in a Rottweiler: computed tomographic, gross morfological and histological features

Abstract

Among the tumors affecting the choroid plexus in dogs, the papilloma ranks second place in incidence after cell carcinoma tumors. Presumptive diagnosis can be made through imaging methods, such as computed tomography and magnetic resonance images. Definitive diagnosis of plexus choroid tumor is based on histopathological findings. This report presented the tomographic features of the brain in a 6-year-old intact female Rottweiler with choroid plexus papilloma. The computed tomography showed right lateral ventricle enlargement, midline deviation and an enhanced mass into the postcontrast phase. At necropsy, a mass on the floor of the right lateral ventricle was observed, associated with important ventricle dilatation. The histopathological analysis demonstrated the presence of neoplastic cell forms with papillary projections. The computed tomography proved to be an effective tool in the presumptive diagnosis of this kind of cerebral disorder.

Transcallosal Removal of a Choroid Plexus Tumor From the Lateral Ventricle in a Dog. Case Report

“…It projects into the ventricular cavities. The CP produces cerebrospinal fluid (CSF) by secretion and filtration ( 1 , 2 ). Choroid plexus tumors (CPT) develop from the epithelium of the intracranial blood vessels.…”

“…Choroid plexus tumors (CPT) develop from the epithelium of the intracranial blood vessels. Based on literature, CPT are responsible for the 10% of all intracranial tumors in dogs, are usually benign tumors, and can be found in any ventricles ( 1 – 6 ). In humans, the most common location is the lateral ventricle in children and the fourth ventricle in adults ( 7 – 9 ).…”

“…They account for 1–20% of brain tumors in children but only 0.5% in adults ( 10 , 11 ). In dogs, CPT is observed frequently in the fourth ventricle, however, it may also appear in the third and lateral ventricles ( 1 ).…”