ABSTRACT
Primary aldosteronism rarely complicates pregnancy. We present a woman with primary
aldosteronism in pregnancy associated with severe preeclampsia. A 33-year-old Japanese
woman with hypertension was referred to our hospital at 25 weeks of gestation. Her
blood pressure was 180/100 mmHg, and laboratory tests identified a low serum potassium
level and moderate proteinuria on urinalysis. The fetus was diagnosed with growth
restriction. Plasma renin activity (PRA) value was 2.2 ng/mL/h and plasma aldosterone
concentration (PAC) was elevated (260 pg/mL). The patient was treated medically. At
27 weeks of gestation, we noted persistent late fetal heart rate decelerations associated
with uterine contractions. Therefore, elective caesarean section was performed and
she was delivered of a 698-g female. After delivery, PRA declined and PAC remained
elevated. Abdominal computerized tomography scan and I-iodochoresterol scan revealed
a tumor in the left adrenal gland. Laparoscopic adrenalectomy was performed and confirmed
the clinical diagnosis.
KEYWORD
Primary aldosteronism - pregnancy - rennin