Intracranial cystic lesion introduction dr ahmed esawy ct mri part 1 • 1-arachnoid cysts • 2-porencephalic cyst, • 4-multicystic encephalomalacia • 3-hydranencephaly • 5-holoprosencephaly • 6-hydrocephalus (aqueduct stenosis) • 7-periventricular leukomalacia (PVL), • 8-septum pellucidum changes CSP CV CI • 9-dandy walker malformation • 10-dandy walker varaint • 11-mega cisterna magna • 12-schizencephaly • 13-conatal cysts • 14-subependymal cysts • 15-encephalomalacia, • 16-subarachnoid cyst • 17-cystic lesions after brain surgery and radiation injury to the brain. • 18-Leptomeningeal cyst • 19-Post traumatic porenencephally • 20-brain abscess • 21-cysticercosis • 22-hydatid cyst. • 23-amoebic abscess • 24-Aneurysm • 25-Parenchymal Perianeurysmal Cystic Changes in the Brain • 26-Vein of Galen malformation • 27-epidermoid cysts • 28-dermoid cyst (cystic teratoma) • 29-craniopharyngioma • 30-cystic astrocytoma • 31-cystic meningioma • 32-cystic shwannoma • 33-hemangioblastoma • 34-cystic metastasis • 35-cystic pituitary adenoma • 36-Cystic degeneration / necrotic neoplasm • 37-colloid cysts • 38-Rathke’s cleft cysts, • 39-neuroepithelial cysts • 40-neuroenteric cysts • 41-pineal cysts. • 42-Choriod plexus cyst • 43-CSF-Iike Choroidal Fissure and Parenchymal Cysts of the Brain • 44-Trigonal cyst • 45-Interhemispheric cyst • 46-Dorsal cyst • 47-Ependymal cysts • 48-Enlarged VRS • 49-Cystic trapped 4th ventricle • 50-Diverticulation of 3rd , lateral ventricle