The formation and propagation of a peroneal intraneural ganglion (the most common type of intraneural cyst) is illustrated. This video highlights the articular branch connection and the phasic nature of ascent (up the articular branch to the common peroneal nerve); cross-over within the shared epineurial sheath of the sciatic nerve; and descent (down the tibial nerve).
This information has been taken from Peroneal and Tibial Intraneural Ganglion Cysts in the Knee Region, a manuscript that can be read here: http://journals.lww.com/neurosurgery/… . It was submitted by corresponding author Robert J. Spinner, MD, from the Department of Neurologic Surgery at the Mayo Clinic in Rochester, Minnesota.