The Marine-Lenhart syndrome revisited

The coexistence of thyroid autonomy (Plummer's disease) and Graves' disease has been termed "Marine-Lenhart syndrome". During the last years, several papers have been published on the development of Graves' disease shortly after radioiodine therapy of Plummer's disease (autonomy). Especially in patients with elevated thyroid antibodies, the incidence of this event is significantly higher after radioiodine therapy of autonomy. A review of the literature dating back to 1911 is discussed in this paper. The original paper published by Marine and Lenhart comes to the conclusion that the two diseases are different expressions of one disease. Looking at the literature, we have to state now that the Marine-Lenhart syndrome has never existed: With Plummer we know now that Plummer's and Graves' disease are different diseases. They may develop in the same patient but independent from each other.