37 years Male (DOB:9/1/1978)Reason: hx of astrocytoma, evidence of progression or meningeal enhancement History: chin numbnessPROVIDER/ATTENDING NAME: THOMAS J KELLY THOMAS J KELLY There is redemonstration of a nonenhancing mass located in the midbrain and centered in the right posterior paramedian aspect measuring 18 x 21 mm axial dimensions and 19 x 22 mm coronal dimensions. On the prior exam measured 18 x 21 mm coronal dimensions this mass is well-circumscribed. It has a cerebral blood volume characteristics and are similar to white matter on the current exam.. The aqueduct of Sylvius appears to be narrowed, however, the lateral ventricles do not appear to be significantly enlargedThere is redemonstration of a tract of T2 signal hyperintensity emanating from a burr hole through the right frontal lobe into the right lateral ventricle which mostly represents a prior surgical tractNormal vascular flow voids are present in the distal carotid and vertebral arteries, the basilar artery and the proximal anterior, middle and posterior cerebral arteries as well as the internal cerebral veins and superior sagittal sinus. The right A1 segment appears to be very small.The visualized portions of the paranasal sinuses demonstrate some mucosal thickening The visualized portions of the mastoid air cells are clear. The visualized portions of the orbits are intact.
The right midbrain mass appears stable compared to prior exam. It is known to represent a low grade astrocytoma. No ventriculomegaly is appreciated on the current exam.