Avascular Necrosis, also known as avn, is related to familial avascular necrosis of femoral head and gaucher's disease. An important gene associated with Avascular Necrosis is COL2A1 (Collagen Type II Alpha 1 Chain). The drugs Tacrine and Vecuronium have been mentioned in the context of this disorder. Affiliated tissues include bone and bone marrow, and related phenotype is cardiovascular system.