Significance of Computed Tomography and Serum Potassium in Predicting Subtype Diagnosis of Primary Aldosteronism

• DOI: 10.1210/jc.2017-01774
• Publication Date: 2018-03-06T18:56:59Z
• Authors: Hironobu Umakoshi; Mika Tsuiki; Yoshiyu Takeda; Isao Kurihara; Hiroshi Itoh; Takuyuki Katabami; Takamasa Ichijo; Norio Wada; Takanobu Yoshimoto; Yoshihiro Ogawa; Junji Kawashima; Masakatsu Sone; Nobuya Inagaki; Katsutoshi Takahashi; Minemori Watanabe; Yuichi Matsuda; Hiroki Kobayashi; Hirotaka Shibata; Kohei Kamemura; Michio Otsuki; Yuichi Fujii; Koichi Yamamto; Atsushi Ogo; Toshihiko Yanase; Tomoko Suzuki; Mitsuhide Naruse
• Keywords: Adult; Male; Blood Specimen Collection; Middle Aged; 3. Good health; 03 medical and health sciences; 0302 clinical medicine; Predictive Value of Tests; Adrenal Glands; Hyperaldosteronism; Potassium; Humans; Female; Registries; Tomography, X-Ray Computed; Algorithms; Biomarkers; Retrospective Studies

The number of centers with established adrenal venous sampling (AVS) programs for the subtype diagnosis of primary aldosteronism (PA) is limited.Aim was to develop an algorithm for AVS based on subtype prediction by computed tomography (CT) and serum potassium.A multi-institutional retrospective cohort study in Japan.A total of 1591 patients with PA were classified into four groups according to CT findings and potassium status. Subtype diagnosis of PA was determined by AVS.Prediction value of the combination of CT findings and potassium status for subtype diagnosis.The percentages of unilateral hyperaldosteronism on AVS were higher in patients with unilateral disease on CT than those with bilateral normal results on CT (50.8% vs 14.6%, P < 0.01), and these percentages were higher in those with hypokalemia than those with normokalemia (58.4% vs 11.5%, P < 0.01). The prevalence and odds ratio for unilateral hyperaldosteronism on AVS were as follows: bilateral normal on CT with normokalemia, 6.2% (reference); unilateral disease on CT with normokalemia, 23.8% and 4.8 [95% confidence interval (CI), 3.1 to 7.2]; bilateral normal on CT with hypokalemia, 38.1% and 9.4 (95% CI, 6.2 to 14.1), and unilateral disease on CT with hypokalemia, 70.6% and 36.4 (95% CI, 24.7 to 53.5).Patients with PA with bilateral normal results on CT and normokalemia likely have a low prior probability of a lateralized form of AVS and could be treated medically, whereas those with unilateral disease on CT and hypokalemia have a high probability of a lateralized form of AVS.