Primary Hyperaldosteronism: A Rare Cause of Malignant Hypertension with Thrombotic Microangiopathy in a Kidney Transplant Recipient

Table 2

Secondary hypertension workup.

Workup	Result (normal range)
24-hour urinary cortisol	25.5 μg/24 h (4.3-45)
Plasma renin activity (PRA)	4.6 ng/mL/h (06-4.3)
Serum aldosterone	144.6 ng/dL (4.0-31.0)
Aldosterone/PRA	31 (<30)
24-hour urinary metanephrines
Normetanephrine	284 μg (<632)
Metanephrine	104 μg (<276)
3-Methoxythyramine	144 μg (<426)
TSH	4.68 μUI/mL (0.5-5.0)
Free T4	15.8 pmol/L ng/dL (12-30)
Renal Doppler	Without renal artery stenosis
Abdominal CT and MRI	Left adrenal nodule  cm
MIBG scintigraphy	Negative for neural crest tumours