Amyloidosis is the result of a pathological phenomenon in which aggregating proteins are deposited in tissue. Today, 30 different diseases are associated with amyloidosis, including Alzheimer's and Parkinson's disease. Amyloid deposits of the plasma protein transthyretin (TTR) are directly linked to the development of familial amyloidosis with polyneuropathy (FAP), a progressive nerve disease also known in Sweden as Skelleftejukan. Preeclampsia is a serious complication that affects 5-8% of all pregnancies and is one of the most common causes of fetal death. The cause of pre-eclampsia has been unknown until now. However, we will soon publish results describing how aggregates of TTR are very likely to be the direct cause of the disease. This is a breakthrough in many ways where parallels between the different diseases can now be made. FAP is one of the few amyloidoses that is currently clinically treatable and a drug and the possibility of treating pre-eclampsia according to the same principle is a very interesting question. Interestingly, the results also suggest that transthyretin may have an additional function in the body that could be linked to the development of Alzheimer's disease. Taken together, these findings, in addition to increasing our basic understanding of these diseases, provide opportunities for the development of new treatments.