Male, 59 years old, with brain metastasis, history of non-small cell lung carcinoma, planning examination for stereotactic radiosurgery. A 9 mm, round, homogeneously enhancing nodule is evident within the cortex of the left occipital lobe. This lesion produces no significant surrounding edema and there is no associated mass effect.A 3 mm focus of extra-axial enhancement is seen along the right planum sphenoidale. No other intracranial enhancing lesions are seen. No parenchymal edema or mass effect is detected. No acute intracranial hemorrhage or any abnormal extra-axial fluid collection is seen. The ventricles are normal in size and morphology.
1.A 9 mm cortically based enhancing lesion is seen within the left occipital lobe causing no significant edema or mass effect. Given the history, this most likely represents a focus of metastatic disease.2.A 3 mm focus of extra-axial enhancement along the right planum sphenoidale could represent a small incidental meningioma. Attention on follow-up examinations will be required.