The 14 ruptured/bleeding cysts accounted for six percent of all arachnoid cysts detected at the authors' hospital. The patients were ten boys and four girls, average age six years.

Philadelphia, Pa. (May 21, 2013) – Arachnoid cysts are a common type of brain lesion that is usually harmless, but with a risk of rupture or bleeding. A new study identifies risk factors for ...

Most arachnoid cysts are not symptomatic and can be followed with surveillance and routine imaging. They are readily seen on CT and MRI scans.” If the cysts do cause symptoms, those signs vary.

Doctors call these primary arachnoid cysts. ... such as an MRI, CT, or ultrasound scan. ... such as skin cysts, to cause pain unless they rupture, or there is inflammation or infection.

Risk is higher for children with larger cysts and a recent history of even mild head trauma, according to the report by Dr. Jay Riva-Cambrin of University of Utah, Salt Lake City.