<prompt> The following are autosomal dominant disorders exceptMytonic dystrophyVon Willebrand diseaseHaemochromatosisMarfans syndrome  <response>: Iron overload indicates accumulation of iron in the body from any cause. The most impoant causes are hereditary haemochromatosis HHC, a genetic disorder, and transfusional iron overload, which can result from repeated blood transfusions Ref Robbins 9 e pg 170 