Jelinek J, Smirniotopoulos J G, Parisi J E, Kanzer M
Department of Radiology, Walter Reed Army Medical Center, Washington, DC 20307-5001.
AJNR Am J Neuroradiol. 1990 May;11(3):567-74.
The differential diagnosis of lateral ventricular tumors was explored by retrospective analysis of 47 pathologically proved cases identified by CT and/or MR imaging. Third ventricular tumors adjacent to the foramen of Monro (e.g., colloid cysts) were excluded. Forty-six patients underwent CT, and eight had MR imaging. The most common neoplasms were choroid plexus papilloma (10 cases) and meningioma (nine cases). Other common neoplasms included subependymoma (six cases), subependymal giant cell astrocytoma (five cases), and metastasis/lymphoma (four cases). Important features for differential diagnosis included age of the patient, the tumor's location within the lateral ventricle, and density on CT before IV administration of contrast material. Fifty percent of the tumors were in the ventricular atrium. All intraventricular tumor types (except subependymoma) showed contrast enhancement. MR was most useful in evaluating tumor location, size, and extent, but it did not help in eliminating alternative diagnoses. On the basis of patients' ages, specific tumor location, and the appearance on CT scans or MR images, an algorithm for differential diagnosis of lateral ventricular tumors was developed.
通过对47例经CT和/或MR成像确诊的病理证实病例进行回顾性分析，探讨侧脑室肿瘤的鉴别诊断。排除了与孟氏孔相邻的第三脑室肿瘤（如胶样囊肿）。46例患者接受了CT检查，8例进行了MR成像。最常见的肿瘤是脉络丛乳头状瘤（10例）和脑膜瘤（9例）。其他常见肿瘤包括室管膜下瘤（6例）、室管膜下巨细胞星形细胞瘤（5例）以及转移瘤/淋巴瘤（4例）。鉴别诊断的重要特征包括患者年龄、肿瘤在侧脑室内的位置以及静脉注射造影剂前CT上的密度。50%的肿瘤位于脑室心房。所有脑室内肿瘤类型（室管膜下瘤除外）均显示对比增强。MR在评估肿瘤位置、大小和范围方面最有用，但无助于排除其他诊断。根据患者年龄、特定肿瘤位置以及CT扫描或MR图像表现，制定了侧脑室肿瘤的鉴别诊断算法。
