Magnetic resonance imaging evaluation of normal variations of corpus callosum according to sex and age

To evaluate changes in the size and morphology of the corpus callosum as regard sex and age. Two hundred persons with ages ranged between 20 and 80 years and had no psychiatric disorders or lesion involving the corpus callosum or adjacent structures including 100 males and 100 females were studied by MRI for brain. The study revealed increase in total callosal area in females than in males. The maximum changes in size were found in isthmus and splenium and least variations occurred in the trunk. There was no specific sex variation in genu and rostrum. There was definite decrease in the total callosal area in old age group in both sexes. In males the decrease was evident above age of 60 years and in females above the age of 70 years. The maximal decline in size was found in the genu. No specific morphological patterns could be described for corpus callosum in different sex or age groups. MRI is the most valuable imaging modality in evaluation of the corpus callosum. The females have larger corpus callosum evidently seen at posterior part. There is decline in size of corpus callosum in old age evidently seen in the anterior part

Computed tomography [CT] versus magnetic resonance imaging [MRI] in differentiation between neoplastic orbital lesions

To compare between the role of CT and MRI in diagnosis of neoplastic orbital lesions. The study included 126 patients proved to have orbital neoplasm and were subjected to CT and MRI. The study included. 59 males and 67 females with age ranged from 12 days to 91 years. The orbital lesions were bilateral in 16 patients. The lesions were distributed according to their location in one or more of the five orbital compartments including optic nerve, globe, conal intraconal, extra-conal and preseptal space. The most frequent encountered lesion was lymphoma followed by following order: uveal melanoma, optic nerve glioma, juxtaorbital meningioma, retinoblastoma, optic nerve meningioma, rhabdomyosarcoma, metastases, pleomorphic carcinoma, leukemia, aneurysmal bone cyst, schwannoma, neurofibroma, capillary hemangioma, basal cell fibroma, lacrimal gland carcinoma, malignant fibrous histiocytoma, malignant teratoma, osteoma, assifying fibroma and esthesioneuroblastoma. CT assessed the attenuation values of the lesion, presence of enhancement, bony changes and calc/lcations. MRJ assessed signal changes on T1 and T2WI and enhancement. CT and MRI are complimentary studies for imaging of orbital neoplasm