HELLP syndrome, a combination of haemolysis, elevated liver function t
ests and a low platelet count, is described as a rare but serious comp
lication of pregnancy. Some authors term HELLP syndrome an ''acute aut
oimmune status''. This thesis is based upon positive platelet IgG anti
bodies, autoimmune haemolysis and passive disease transfer to the fetu
s. We diagnosed the onset of type 1 (insulin-dependent) diabetes melli
tus in a 30-year-old patient with HELLP syndrome during the 35th week
of pregnancy. As immune mechanisms, together with other factors, play
a fundamental role in the development of type 1 diabetes, a combinatio
n of autoimmune reactions could explain the onset of type 1 diabetes i
n a patient with altered immune status. To our knowledge this is the f
irst report of such an association.