 The frontal horn span at the level of foramen of Munro is 3.8 cm with a flat 3rd ventricular contour and a 3rd ventricular span of 11 mm. 
The frontal horn span at the level of foramen of Munro is 3.8 cm with a flat 3rd ventricular contour and a 3rd ventricular span of 11 mm .