Which of the following is a severe feature of preeclampsia?

Thrombocytopenia, which refers to a low platelet count, is recognized as a severe feature of preeclampsia. In cases of preeclampsia, especially severe preeclampsia, the decrease in platelet levels can be indicative of worsening maternal condition and an increased risk of complications. This condition can be associated with the development of hemolysis, elevated liver enzymes, and low platelet count, collectively known as HELLP syndrome, which is a serious complication of preeclampsia.

The presence of thrombocytopenia can suggest that the woman's vascular system is under stress and that there may be significant liver involvement or other systemic effects resulting from the preeclampsia. Monitoring platelet counts in pregnant women diagnosed with preeclampsia is crucial for assessing the severity of the disease and determining appropriate management and intervention necessary to protect both maternal and fetal well-being.

Other conditions listed, such as hyperthyroidism, anemia, and gestational diabetes, are not classified as severe features of preeclampsia. While they can occur during pregnancy and may complicate care, they do not share the same direct association with the serious complications associated with preeclampsia.