Minimally Invasive en bloc Excision of Rare Hemorrhagic Discal Cysts Using Unilateral Biportal Endoscopic Technique: A Report of Two Cases

Abstract

The hemorrhagic discal cyst (HDC) is a rare intraspinal extradural cystic lesion that connects with the lumbar intervertebral discs [1]. The pathophysiology of the HDC is unclear. Most of the reported cases are relatively young and active males possibly associated with trauma histories [2].The clinical presentations of HDC are very much like the lumbar disc herniation. The differential diagnosis between them was not difficult under the magnetic resonance images