%0 Journal Article %T Masseter muscle rigidity: Atypical malignant hyperthermia presentation or isolated event? %A Onyeka Tonia %J Saudi Journal of Anaesthesia %D 2010 %I Medknow Publications %X This report describes a case of masseter muscle rigidity encountered at the start of an elective gynaecological procedure. At preoperative assessment, the patient, a 41-year old woman with a previous non-eventful surgical and anesthetic history was given a Mallampati score of 3. Following suxamethonium administration, full mouth opening proved difficult. Laryngoscopy and tracheal intubation were not possible leading to the eventual use of a laryngeal mask airway and resulting in a successful anaesthetic outcome. A number of possibilities that may account for this situation as well as viable options for airway access in such cases are discussed below. %K Atypical malignant hyperthermia %K intubation %K laryngoscopy %K laryngeal mask airway %K masseter muscle rigidity %K suxamethonium %U http://www.saudija.org/article.asp?issn=1658-354X;year=2010;volume=4;issue=3;spage=205;epage=206;aulast=Onyeka