What causes enlargement of the liver in someone with pre-eclampsia?

Not fully understood. Preeclampsia and eclampsia are not fully understood. Neither are fully understood laboratory changes associated with it like changes in liver enzyme levels or platelet numbers nor why sometimes the liver is enlarged or the kidneys show signs of damage and at other times they don't. Effective treatment in almost all cases is removal of the placenta, with sooner or later recovery of the patient.