Legend Sagittal T1-WI demonstrates a heterogeneously hyperintense left frontal lobe mass. A T2-WI with fat saturation demonstrates the lesion to follow fat signal intensity. Note the characteristic chemical shift artifact in the anterior margin of the lesion on the axial FLAIR sequence. Also note the droplets of hyperintensity in the subarachnoid space near the anterior interhemispheric fissure.

Legend Sagittal T1-WI again demonstrates multiple foci of T1 shortening present within the subarachnoid space. Diffusion imaging shows no susceptibility artifact that might be encountered with blood products. Of note, there is no restricted diffusion. Coronal T1-WI better demonstrate the fat signal of the lesion with the associated subarachnoid spread. Again note the chemical shift artifact.

Legend Fat saturation confirms the nature of the lesion. Some capsular enhancement is seen. Key words: mri tumor neoplasia

Brain Diagnosis: Ruptured dermoid cyst