Microdecompression. A, Muscle is taken down on only one side, and ipsilateral decompressive hemilaminotomy is done; contralateral side is accessed under midline structures. B, Sac and root are gently retracted for contralateral decompression. C, End result is complete decompression with preservation of paraspinal musculature and interspinous and supraspinous ligaments, limited dead space, and excellent cosmetic result. SEETECHNIQUE 39.31.