|
FIG 4. Case 15. Five months after left frontal craniotomy and resection of an oligodendroglioma, 45-year-old patient presented with headache. Postoperative therapy included adjuvant radiation therapy and steroids for headaches. This MR imaging study prompted a repeat operation in which two abscesses containing gram-positive cocci, one superficial and one deep, were discovered.
A, FLAIR image (9002/165/1 [TR/TEeff/excitation]; inversion time, 2200) shows a large left frontal mass with surrounding signal abnormality (abscess at operation) and debris in the left atrium.
B, Axial T1-weighted image (500/20/1 [TR/TE/excitation]) shows a cavitary left frontal lesion with peripheral enhancement. At second operation, this proved to be a deep abscess that was in continuity with the ventricle
C, Diffusion-weighted image (10,000/96.8/1000 [TR/TEeff/TI]) shows hyperintense signal in the left ventricular debris.
D, Apparent diffusion coefficient maps do not show restricted diffusion in the left ventricular pus.
|