1. Behind the chiasm lies the floor of the third ventricle . 2. Extension of craniopharyngiomas into the third ventricle may cause hydrocephalus. 3. Both sexes displayed a reduction in dorsal third ventricle area and hippocampal area. 4. Compressive lesions often cause headache and may compress the third ventricle leading to hydrocephalus. 5. The Rathke s pouch grows towards the third ventricle and fuses with the diverticulum. 6. The medial surface of the two halves constitute the upper lateral wall of the third ventricle . 7. It passes into the interventricular foramen, and is present at the top of the third ventricle . 8. :Parts of hypothalamus are bounded by the third ventricle , optic tracts, and cerebral peduncles. 9. Interestingly, an autopsy performed on Cushing revealed that his brain harbored a colloid cyst of the third ventricle . 10. They are tightly packed on the capillaries, forming a seal between the third ventricle and the median eminence.