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Conjoint Nerve Root an Intraoperative Challenge in Minimally Invasive Tubular Discectomy
Sharma Ayush,Singh Vijay,Agrawal Romit,Mangale Nilesh,Deepak Priyank,Savla Jeet,Jaiswal Ajay 대한척추외과학회 2021 Asian Spine Journal Vol.15 No.4
Conjoint nerve root (CNR) is an embryological nerve root anomaly that mainly involves the lumbosacral region. The presence of CNR during tubular discectomy raises the chances of failure in spinal surgery and the risk of neural injuries. Tubular discectomy can be challenging in the presence of CNR owing to limited visualization. Here, we present a technical note on two cases of L5–S1 disc prolapse in the presence of conjoint S1 nerve root that was operated via a minimally invasive tubular approach. Any intraoperative suspicion of CNR while using the tubular approach should prompt the surgeon to perform a thorough tubular decompression prior to nerve root retraction. In patients with a large disc, disc should be approached via the axilla because the axillary area between the dura and the medial boarder of the root is very easy to approach in the presence of CNR. Safe performance of tubular discectomy is possible even in the presence of CNR in the lumbar spine.