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Figure 1 : (a) Axial section of noncontrast T1 weighted MRI scan showing cystic lesion within right frontal lobe of case 1. (b) Sagittal section showing similar cyst in case 1. (c) Axial section of contrast-enhanced MRI scan showing no contrast enhancement of cystic lesion and absence of any mural nodule of case 1. (d) Photomicrograph showing a cyst lined by a single layer of columnar epithelium and the wall composed of glial tissue (hematoxylin and eosin, ×40) in case 1

Figure 1 : (a) Axial section of noncontrast T1 weighted MRI scan showing cystic lesion within right frontal lobe of case 1. (b) Sagittal section showing similar cyst in case 1. (c) Axial section of contrast-enhanced MRI scan showing no contrast enhancement of cystic lesion and absence of any mural nodule of case 1. (d) Photomicrograph showing a cyst lined by a single layer of columnar epithelium and the wall composed of glial tissue (hematoxylin and eosin, ×40) in case 1