Malignant Hyperthermia 4, also known as malignant hyperthermia, susceptibility to, 4, is related to malignant hyperthermia susceptibility and neuroleptic malignant syndrome. An important gene associated with Malignant Hyperthermia 4 is MHS4 (Malignant Hyperthermia Susceptibility 4). Affiliated tissues include heart, and related phenotypes are malignant hyperthermia and acidosis