de Mendonca J L F, Barbosa H, Viana S L, Freitas F M O, Viana M A C B, Ferreira A C L
Radiology Unit, Hospital de Base do Distrito Federal, SMHS 101, Bloco A, Subsolo, CEP 70335-900, Brasilia, DF, Brazil.
Br J Radiol. 2005 Nov;78(935):1042-6. doi: 10.1259/bjr/97374075.
Pseudotumoural hemicerebellitis is exceedingly rare. It may closely resemble a tumour either clinically or on imaging, and a high index of suspicion is required to avoid unnecessary surgical procedures. MRI is the most useful diagnostic tool, and reveals a swollen cerebellar hemisphere, hyperintense in T(2) weighted images. A pattern of predominantly pial contrast enhancement, absence of a well-defined mass and regression of the abnormalities in follow up examinations help to rule out malignancy. We report two cases of pseudotumoural cerebellitis (an 11-year-old girl and a 9-year-old boy) studied with CT and MRI.
假性肿瘤性半侧小脑炎极为罕见。它在临床或影像学上可能与肿瘤极为相似，因此需要高度怀疑以避免不必要的外科手术。磁共振成像（MRI）是最有用的诊断工具，可显示小脑半球肿胀，在T2加权图像上呈高信号。主要为软脑膜对比增强、无明确肿块以及随访检查中异常情况消退的表现有助于排除恶性肿瘤。我们报告两例假性肿瘤性小脑炎病例（一名11岁女孩和一名9岁男孩），对其进行了CT和MRI检查。
