INTRACRANIAL LYMPHOMA - RADIOLOGICAL FIND INGS IN 40 PATIENTS

We analysed the radiologically findings of 40 patients with histologic ally confirmed cerebral lymphoma but without AIDS in a retrospective s tudy; 31 of these had primary cerebral lymphoma without any other mani festation of the disease. All patients had CT, 24 had angiography and in five patients MRT had been performed in addition. CT showed a solit ary lesion in 60 %, of these 62 % had scalloped margins and 38 % were nodular, 34 % were isodense and 57 % were hyperdense. Following contra st injection, there was increased density in 97 % of the lesions. The most frequent localisation was in the region of the basal ganglia and the corpus callosum (33 %), in the frontal lobes (30 %) and in the tem poral lobes (20 %). Angiographically, 63 % showed evidence of a space- occupying lesion, there were vascular irregularities in 33 % and tumou r contrast in 21 %; in 25 % of the patients angiography was normal. Ea rly venous filling was not found in any case. T1 weighted sequences du ring MRT of 5 patients showed the tumour to be isointense or slightly hypointense. T2 weighted images showed the tumour to be hyperintense o r with mixed signal intensities.