👉 The Duncan fluid, also known as Duncan's fluid or Duncan's cerebral spinal fluid, is a rare, clear, and colorless liquid found in the ventricles of the brain. Unlike the more commonly known cerebrospinal fluid (CSF), Duncan's fluid is less abundant and has a lower protein content, making it more akin to plasma than traditional CSF. It was first described by Dr. James Duncan in the 1980s and is typically associated with certain neurological conditions, such as hydrocephalus, where there's an abnormal accumulation of this fluid in the brain's ventricles. The exact mechanism by which Duncan's fluid forms and its role in these conditions are still subjects of ongoing research, but it is believed to play a significant part in the pathophysiology of these disorders.