BTG3 and Autoimmunity: The syndrome affecting the patients in our series is not due to an autoimmunity of the type already known, so much so that the classic autoantibodies (ANA, ENA, ANCA: anti-neutrophil cytoplasm; APCA: anti-parietal cell; ASMA: anti-smooth muscle; CMA: anti-cardiac muscle) are all negative in the 15 patients for whom we had the tests available.