Large basal ganglia cyst in site of previously radiated glioma. Case report.
A 3 1/2-year-old boy developed a mass lesion in the right basal ganglia and midbrain, compatible with glioma. During radiation therapy, aqueduct obstruction developed, necessitating a ventriculoatrial (VA) shunt. The child improved and remained well for 6 years, when he developed recurrent symptoms. A computerized tomographic (CT) scan and ventriculogram revealed a large cyst arising from the region of the right basal ganglia, the site of the previous tumor. The VA shunt was converted to a cyst atrial shunt. Subsequently, the cyst decreased in size, but hydrocephalus recurred, as demonstrated by a second CT scan. A Y-tube shunt (one catheter in the cyst, one in the ventricle) has controlled symptoms and signs since that time.
D001479:Basal Ganglia; D001927:Brain Diseases / Q000000981:diagnostic imaging / Q000209:etiology*; D001932:Brain Neoplasms / Q000532:radiotherapy*; D002675:Child, Preschool; D003560:Cysts / Q000000981:diagnostic imaging / Q000209:etiology*; D005910:Glioma / Q000532:radiotherapy*; D006801:Humans; D006849:Hydrocephalus / Q000209:etiology; D008297:Male; D011878:Radiotherapy / Q000009:adverse effects; D014057:Tomography, X-Ray Computed