Disorder of brain, unspecified [G93.9], Reason for Study: ^Reason: pre-op planning. Patient needs fiducials History: brain tumor Multiple fiducial markers attached on scalp for the preparation of image guided operation.There is a 23.8 mm x 28. 7 mm sized thick irregular wall enhancing mass located on the floor of the fourth ventricle with surrounding edema. There is also a small enhancing nodule adjacent to the main mass which imply possible daughter lesion. Ventricular system appears to be slightly enlarged but no evidence of acute hydrocephalus.No other enhancing lesion is seen.Normal flow voids are identified in the major intracranial vessels. The paranasal sinuses and mastoid air cells are clear.
Irregular thick wall enhancing mass on the 4th ventricle wall as described above indicating possible malignant nature of the lesion such as metastasis.Mild ventriculomegaly was seen.