Pineal Parenchymal Tumors: CT and MR Features
Pineal Parenchymal Tumors: CT and MR Features
复制标题
松果体实质肿瘤：CT 和 MR 特征
DOI：
10.1097/00004728-199507000-00001
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发表时间：
1995
影响因子：
1.3
通讯作者：
H. Mena
中科院分区：
文献类型：
--
作者：
M. Chiechi;J. Smirniotopoulos;H. Mena
目的探讨松果体实质肿瘤的CT、MR及病理特征。材料与方法回顾性分析19例经手术切除并经病理证实的松果体细胞瘤（PCs）10例。1例混合性松果体细胞瘤-松果体母细胞瘤（PC-PB），8例松果体母细胞瘤（PB）]，记录临床、CT和MRI特征。结果男6例，女4例;女1例，混合型;女7例，男1例。CT图像显示10个圆形肿块中有6个，10个小到中等大小的肿块中有6个; 9个肿块中有7个是均匀的，其中1个呈囊性。混合的PC-PB是圆形的和均匀的。8例PCs和PC-PB的术前CT扫描显示钙化，无论是外周（8例中的4例）还是中央（8例中的4例，包括混合瘤）。松果体细胞瘤为低密度（5/7）肿瘤，增强后不均匀强化（5/7）。大多数PB（8个中的6个）呈分叶状，8个中的5个是均匀的。CT扫描8例肺动脉瘤中4例为非钙化高密度肿块，强化均匀。松果体细胞瘤和PC-PB在MRI上具有不同的信号强度。大多数PB在T1加权图像上呈低信号至等信号，6/6例增强不均匀。结论松果体细胞瘤主要是较小、圆形、低密度、均匀的肿块，伴有钙化，尤其是外周钙化。在CT上不均匀增强，老年患者表现为较轻程度的脑积水。另一方面，成松果体细胞瘤是一种较大的、分叶状的、同质性肿瘤，很少钙化，并伴有较大程度的脑积水，常发生于年轻女性。它们在CT上呈高密度，在T1加权像上呈低等信号，在CT上呈均匀强化，在MRI上呈不均匀强化。
Objective Our goal was to characterize the CT, MR, and pathologic features of pineal parenchymal tumors (PPTs). Materials and Methods We retrospectively reviewed 19 cases of resected PPTs with pathologic confirmation [10 pineocytomas (PCs). I mixed pineocytoma-pineoblastoma (PC-PB), and 8 pineoblastomas (PBs)], noting clinical, CT, and MRI features. Results Six male and four female patients presented with PC, one female patient with mixed PC-PB, and seven female and one male patient with PB. The CT imaging revealed 6 of 10 round and 6 of 10 small- to medium-sized masses; 7 of 9 were homogeneous, I of which appeared cystic. The mixed PC-PB was round and homogeneous. Eight precontract CT scans of PCs and the PC-PB demonstrated calcifications, either peripheral (four of eight) or central (four of eight, including the mixed tumor). Pineocytomas were hypodense (five of seven) tumors, with heterogeneous postcontrast enhancement (five of seven). Most PBs (six of eight) were lobulated, and five of eight were homogeneous. Four of eight PBs imaged with CT were noncalcified hyperdense masses, which enhanced homogeneously. Pineocytomas and the PC-PB had variable signal intensity on MRI. Most PBs were hypo- to isointense on T1-weighted images, and six of six enhanced heterogeneously postgadolinium. Conclusion Pineocytomas are predominantly smaller, round, hypodense, homogeneous masses with calcifications, particularly peripheral. They enhance heterogeneously on CT and present with a lesser degree of hydrocephalus in older patients. Pineoblastomas, on the other hand, are larger, lobulated, homogeneous tumors, are infrequently calcified, and present with a greater degree of hydrocephalus, often in young females. They tend to be hyperdense on CT and hypo- to isointense on T1-weighted images and enhance homogeneously on CT and heterogeneously on MRI.