Fig. 3. Case illustration. A 50-year-old female attended to the hospital due to recent worsening mobility. On the Magnetic resonance imaging, hypertrophy of ligamentum flavum and annular tearing were shown (A, B, C). However, no other specific finding that may cause motor weakness was observed. We completely exposed the epidural lesion after removing ligamentum flavum and found an epidural venous varicosity compressing the L5 nerve root ventrally (D). Nerve root (short arrows). Venous varicosity (long arrows).
