9 year old daughter perfectly healthy before no family history of it has been diagnosed with melignant hyperthermia brought on by surgery to remove tonsils. will her sister 7 years old also be positive for it and do i have to be concerned with heat or exercise causing a episode i know the drug used to put her asleep caused it to happen this time but what about in the future do i need to be concerned this could happen without the sleep medication which as i know can be fatal or cause permanent damage. what about any future surgery what will be used to put her asleep or will she have to be awake for it. none of the doctors or nusrses had ever actually seen MHT they just knew about it from training why my little girl? how do make sure this never happens again i almost lost her fever 107 and her muscles were so tight she was in a coma breathing tube so much all because of a allergy. cant they test for it before surgery since its so fatal thanks for DANTROLENE!!!

Summarized question: What causes melignant hyperthermia in a child?