ABSTRACT
Isolated masseter spasm is a rare entity encountered in patients with neuromuscular disorders and is frequently associated with use of succinylcholine or halogenated inhalational anaesthetic during induction. We present a case of 32-year old primigravida obstetric patient with kypho-scoliosis posted for lower segment caesarean section that developed masseter muscle spasm (MMS) following administration of a standard dose of succinylcholine. The episode resolved spontaneously after 6-7 min without progression to malignant hyperthermia. The report highlights that an event of masseter muscle spasm, though, rarely encountered in life-time practice of an anaesthesiologist, may be successfully managed by maintaining oxygenation and ventilation till the crisis is tided over