zahra janamiri

Background and There has been no report in which preoperative evaluation of ADC for prediction of post therapeutic outcome was presented. The aim of our study was to retrospectively evaluation the use of the apparent diffusion coefficient (ADC) for the prediction of malignancy and the outcome of malignant astrocytic tumors.
We reviewed MRI of 26 male and 14 female patients with a pathologic diagnosis of a malignant astrocytic tumor.
There was a relatively significant correlation between Ki-67 LI and minimum ADC was noted for the asterocitoma group (r=−0.701, P The ADC analysis could be considered as one of the clinically accessible techniques used for prediction of outcome of malignant astrocytic tumors, and it might be useful for planning primary treatment modality in patients with these malignant tumors.

Simple bone cysts are usual, benign, fluid-filled, cystic lesions that often occur in the metaphysis of the long bones and are rarely detected in vertebrae. A case of a simple bone cyst in the body of the fifth lumbar vertebra in a 28-year-old woman with complaint of intermittent low back pain is described. According to the radiologic findings, the lesion was detected as a simple bone cyst, and the diagnosis was determined by imaging.

To record the MRI features of primary central nervous system lymphoma (PCNSL) and compare these properties in monofocal and multifocal disease.
Eleven cases of monofocal disease were compared to 9 cases of multifocal disease. All patients were examined by non-enhanced and contrast-enhanced MRI. Tumor location, signal intensity, enhancement characteristics, age distribution, peritumoral edema, cystic changes, and the presence of calcifications were assessed. The MRI features were compared between the monofocal and multifocal patients.
There were 20 cases including both the monofocal and multifocal cases. Contrast-enhanced images showed variable enhancement patterns: homogeneous enhancement (14 patients), and hetrogenous enhancement (6 patients). One case of hemorrhage and two cases of cystic formation were observed. Intra-tumoral calcification was not detected. The frontal lobe, the corpus callosum and the basal ganglia were commonly involved in both the monofocal and multifocal lesion.
Our data showed that PCNSL has a variable enhancement and edema pattern on MRI. Monofocal PCNSL cases typically have larger size tumors with mild or marked enhancement.