Intracranial granuloma as a rare complication of ventriculoperitoneal shunt. A case report

We report an unusual case of cerebral granuloma secondary to ventriculoperi tonal shunt. A 17 year-old patient presented with choreoathetoid movements of the left upper limb five years after a ventriculoperitoneal shunt and ce rebellar pilocytic astrocytoma excision procedure. MR imaging showed mass l esion in right basal ganglia area surrounding ventricular catheter which se ems to be neoplastic. Stereotactic biopsy of the lesion with histologic stu dy revealed a granuloma. Ventricular catheter was removed and patient impro ved clinically and lesion disappeared completly on MRI control. At literatu re review, we found only 4 similar cases. Clinical and radiological finding s (CT scan and IRM) ave described as well as pathogenic mecanism involved. Therapeutic procedure should be limited to catheter removal without granulo ma excision.