Abstract：
OBJECTIVE: Few studies have explored the morphology of massa intermedia (MI). The aim of the present study was to characterize it using magnetic resonance imaging (MRI).
METHODS: A total of 205 patients were enrolled in this study. Following initial examinations with conventional MRI sequences, thin-slice coronal and sagittal T2-weighted imaging was performed. For MI localization, the third ventricle was arbitrarily divided into nine areas on the midsagittal image.
RESULTS: MI was identified in 93% of the total patients-89% in male and 91% in female patients. Among them, 68% showed a single, styloid-shaped MI with variable thickness and cross sectional configuration, followed by broad and double MIs that were found in 18% and 10% patients, respectively. In the anteroposterior dimension, 99% of the MIs were identified in the middle third area, followed by the posterior third area. In the supero-inferior dimension, 95% of the MIs were identified in the middle third area, followed by the upper third area. With a significant difference, a broad MI was more frequently found in women than in men.
CONCLUSIONS: MIs are commonly located in the middle third of the third ventricle as a single commissure with high morphological variability. Compared to men, women may have a well-developed, broader MI.
METHODS: A total of 205 patients were enrolled in this study. Following initial examinations with conventional MRI sequences, thin-slice coronal and sagittal T2-weighted imaging was performed. For MI localization, the third ventricle was arbitrarily divided into nine areas on the midsagittal image.
RESULTS: MI was identified in 93% of the total patients-89% in male and 91% in female patients. Among them, 68% showed a single, styloid-shaped MI with variable thickness and cross sectional configuration, followed by broad and double MIs that were found in 18% and 10% patients, respectively. In the anteroposterior dimension, 99% of the MIs were identified in the middle third area, followed by the posterior third area. In the supero-inferior dimension, 95% of the MIs were identified in the middle third area, followed by the upper third area. With a significant difference, a broad MI was more frequently found in women than in men.
CONCLUSIONS: MIs are commonly located in the middle third of the third ventricle as a single commissure with high morphological variability. Compared to men, women may have a well-developed, broader MI.
摘要：
目的：很少有研究探讨中间马萨（MI）的形态学。本研究的目的是使用磁共振成像（MRI）对其进行表征。
方法：本研究共纳入205例患者。在使用常规MRI序列进行初始检查后，进行薄层冠状位和矢状位T2加权成像.对于MI本地化，在中矢状图像上，第三脑室被任意划分为9个区域。
结果：在93％的患者中发现了MI，男性为89％，女性为91％。其中,68%的人表现为单身，具有可变厚度和横截面结构的茎突形状的MI，其次是在18%和10%的患者中发现的广泛和双重MI，分别。在前后维度上，99%的MI是在中间三分之一的地区发现的，其次是后面的第三个区域。在超劣维度，95%的MI是在中间三分之一的地区发现的，其次是上三分之一区。有显著的差异，女性比男性更容易发现广泛的MI。
结论：MI通常位于第三脑室的中三分之一处，作为具有高度形态变异性的单个连合。和男人相比,女人可能有一个发达的，更广泛的MI。
方法：本研究共纳入205例患者。在使用常规MRI序列进行初始检查后，进行薄层冠状位和矢状位T2加权成像.对于MI本地化，在中矢状图像上，第三脑室被任意划分为9个区域。
结果：在93％的患者中发现了MI，男性为89％，女性为91％。其中,68%的人表现为单身，具有可变厚度和横截面结构的茎突形状的MI，其次是在18%和10%的患者中发现的广泛和双重MI，分别。在前后维度上，99%的MI是在中间三分之一的地区发现的，其次是后面的第三个区域。在超劣维度，95%的MI是在中间三分之一的地区发现的，其次是上三分之一区。有显著的差异，女性比男性更容易发现广泛的MI。
结论：MI通常位于第三脑室的中三分之一处，作为具有高度形态变异性的单个连合。和男人相比,女人可能有一个发达的，更广泛的MI。
