Seronegative and seropositive autoimmune autonomic ganglionopathy (AAG): Same clinical picture, same response to immunotherapy.

Two patients with a syndrome of pandisautonomia with clinical criteria of AAG are provided. Both patients present a similar clinical picture and response to immunosuppressive treatment. One of them has positive antibodies against the ganglionic nicotinic acetylcholine (gAChr) and the other does not.