Foraminal stenosis symptoms are similar to those of a pinched nerve or another form of radiculopathy. Possible symptoms, listed from least to most severe, can include one or more of these: Pain. Paresthesia (tingling or a "pins and needles" sensation). Numbness. Muscle weakness or loss of muscle control.. Background Surgeries for far-lateral lumbar disc herniation (FLLDH) and foraminal stenosis at the L5/S1 level are very complicated because of its unique structure. The authors have performed unilateral bi-portal endoscopy (UBE) to these lesions because of the good results obtained for other spinal diseases (Park et al. in Orthopedics 40:e779-e783, 2017). Methods We described our experience.

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Here, we report five cases of bilateral L5 radiculopathy caused purely by L5-S1 foraminal stenosis and describe the clinical and radiological features of these patients in detail. Case presentation: Among the five patients, two were men and three were women with an average age of 69 years. Four patients had undergone surgeries at L4-5 level.. The L5-S1 spinal motion segment, also called the lumbosacral joint, is the transition region between the lumbar spine and sacral spine in the lower back. In this region, the curvature of the spine changes from lumbar lordosis (forward curve) to sacral kyphosis (backward curve). L5-S1 helps transfer loads from the spine into the pelvis and legs.