Postpartum Sciatic Neuropathy After Uncomplicated Vaginal Delivery

Postpartum neuropathies are common, including femoral neuropathy, peroneal neuropathy, lumbosacral trunk plexopathy, and lateral femoral cutaneous neuropathy. Sciatic mononeuropathy in the peripartum period is rare. Postpartum sciatic neuropathy (PSN) in the setting of cesarean section has been reported before. We present a case series of 2 sciatic mononeuropathies after vaginal delivery. Case 1 is a 25-year-old woman who presented with a left foot drop after normal vaginal delivery after being in labor for 3 hours. Case 2 is a 24-year-old woman who presented with a right foot drop after normal vaginal delivery and being in labor for 31 hours. Both cases noted foot drops in the immediate postpartum period. Neurologic examinations revealed flail foot, 4/5 hamstring muscle strength on MRC scale and intact hip abduction. They had paresthesia on the posterolateral aspect of the leg, dorsal and plantar aspect of the foot with absent ankle reflex. MRI did not show evidence of spinal cord, nerve root or plexus involvement. Electrodiagnostic studies revealed evidence of sciatic mononeuropathy proximal to the short head of biceps femoris. They were discharged home with an ankle brace and therapy. At 3 months follow up, they had complete resolution of weakness. There have been a few reported cases of PSN secondary to cesarean section. Sciatic involvement after vaginal delivery is extremely rare. We report 2 cases of PSN after vaginal delivery to highlight that sciatic mononeuropathy can occur not only after cesarean section, but also after uncomplicated vaginal delivery and should raise awareness of this risk to clinicians.