General anesthesia increases the morbid risk for both mother and infant during a cesarean delivery. Failed or asymmetric blocks can force providers to turn to a general anesthetic precipitously. A true one-sided spinal block, with complete absence of anesthesia on one side despite correct subarachnoid technique, is rare and not well characterized in the literature. In this case, a 32-year-old multiparous woman presented for elective repeat cesarean delivery. After an uncomplicated spinal anesthe