77-year-old female with history of lung cancer and probable metastases in left anterior pons Previously described on the recent MRI left anterior pons hemorrhagic lesion appears hyperdense on the nonenhanced CT and it is associated with extensive areas of hypoattenuation involving the pons, mid brain, cerebellum, left thalamus, and posterior limb of the internal capsule. There is no evidence of other hemorrhagic foci in the brain parenchyma. There is no evidence of extra axial fluid collection/hemorrhage or midline shift. The ventricles and basal cisterns are normal in size and configuration.Again noted diffuse calvarial diploic widening, coarsened trabecula and thick cortices with focal areas of sclerotic lesions that are stable compared to prior examination compatible with Paget's disease. The visualized paranasal sinuses and mastoid air cells are normally pneumatized.
1.Stable hyperdense lesion in anterior pons associated with extensive vasogenic edema corresponding to the hemorrhagic lesions seen on recent MRI. No other foci of intraparenchymal high density suggestive of hemorrhage are identified.2.Paget's disease involving the skull.