Figure 4: Microscopic images obtained after histopathological examination of the cyst (a) Low magnification images showing cyst in ligamentum flavum. Cyst wall is fibro-collagenous in nature and shows proliferation of capillaries. (b). Higher magnification images show fibro-collagenous cyst wall. Cyst lining is devoid of epithelium and its lumen contain necrotic debris