<prompt> Answer this question truthfullyWhat is the mnemonic used to remember the causes of osteonecrosis, and what are the different causes represented by each letter of the mnemonic?  <response>: <reason> The mnemonic used to remember the causes of osteonecrosis is CAST Bent LEGS, where C stands for Corticosteroids, A stands for Alcoholism, S stands for Sickle cell disease, T stands for Trauma most common, Bent represents Bends Caisson disease, Le stands for Legg-Calvé-Perthes disease, G stands for Gaucher disease, and S stands for Slipped capital femoral epiphysis SCFE. 