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CT of the brain tumors & abdomen

Glioma Comments primary interracial tumor , vary greatly in malignancy , have many names depending on the histological type grading of malignancy of G. depending on the following : well defined or irregularity of the lesion surrounding edema present or absent associated shifting of midline & crossed midline lesion contrast enhancement associated hemorrhage , necrosis , & cystic formation seeding via csf & dissemination . Low grade G. I well or ill defined lesion iso dence to the brain tissues , not associated with oedeme , no Enhancement , no associated Hemorrhage , necrosis . From G II , III, various previous finding IV( glioblastoma multiforme ) are highly malignant have all previous mentioned features .

Medulloblastoma haemangioblastome notice the dense nodular enhancement

Hydrocephalous 2 typesObstructive ( non – communicating ) Craniophyrengioma MedulloblastomaEpendymomaAquiduct stenosis , comments cause of obstruction being congenital in nature . Non –obstructive ( communicating ) No obstruction of the ventricular pathway , but the absorption of the csf at the level of arachnoids' granulation is occluded secondary to lodge by blood clot or inflammatory cell or infection post meningitis most commonly to occur post SAH .

Hydatid cyst

Normal CT of the abdomen


CT abdomen Hydatid cyst Appear as large oval hypo dense area density of fluid with well defined margin , sometime at their periphery multiple flecks of calcification are seen at their periphery . Hydatid cyst with daughter cyst , appear as multiple hypo densities rounded area within the main loculi with multiple rim of calcification Secondary metastasis in the liver Multiple rounded hypo density areas of different density , shape & different size . Pattern of enhancement is either uniform , target or bulls eye pattern . Hepato megaly .



Hydatid cyst within the liver

Secondary metastasis within the liver

Pancreatitis Patient present with abdominal pain , vomiting with or without jaundice , increase amylase level CT finding Enlargement of the pancreas focal or generalized increase in size . Hypo density within the pancreas focal or generalized due to the edema . Peri pancreatic fluid collection & edema around the pancreas . The fluid around the pancreas if persist more than 6 w become encysted leading to the pancreatic pseudo cyst any area could be affected . Edema of the wall of the stomach .

Abdomenal aortic aneurysm




رفعت المحاضرة من قبل: Hind Alkhataby
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