This diagram shows the pathways cerebrospinal fluid (CSF) takes as it flows from the brain’s surface through facial lymphatic vessels and into lymph nodes in the neck.

The skull base (or cranial base) is the region where the nose and sinuses, with the rest of the head/neck, meet the brain. For patients with malignant tumors involving the nose, sinuses and skull base ...

Newly exposed parts of Tiktaalik roseae --the intermediate fossil between fish and the first animals to walk out of water onto land 375 million years ago--are revealing how this major evolutionary ...