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  • Author: Ryuji Okamoto x
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Hiroki Kobayashi, Yoshihiro Nakamura, Masanori Abe, Isao Kurihara, Hiroshi Itoh, Takamasa Ichijo, Yoshiyu Takeda, Takashi Yoneda, Takuyuki Katabami, Mika Tsuiki, Norio Wada, Yoshihiro Ogawa, Ryuichi Sakamoto, Junji Kawashima, Masakatsu Sone, Nobuya Inagaki, Takanobu Yoshimoto, Tetsuya Yamada, Ryuji Okamoto, Yuichi Matsuda, Megumi Fujita, Minemori Watanabe, Kouichi Tamura, Akiyo Tanabe, Mitsuhide Naruse and JPAS/JRAS Study Group

Objectives

We investigated the clinical significance of ACTH stimulation during adrenal venous sampling (AVS) by surgical outcome of primary aldosteronism (PA).

Design

Multicenter retrospective study by Japan PA study.

Method

We allocated 314 patients with both basal and ACTH-stimulated AVS data who underwent adrenalectomy to three groups: basal lateralization index (LI) ≥2 with ACTH-stimulated LI ≥4 on the ipsilateral side (Unilateral (U) to U group, n = 245); basal LI <2 with ACTH-stimulated LI ≥4 (Bilateral (B) to U group, n = 15); and basal LI ≥2 with ACTH-stimulated LI <4 (U to B group, n = 54). We compared surgical outcomes among the groups using the Primary Aldosteronism Surgical Outcome (PASO) criteria.

Results

Compared with U to U group, U to B group had poor clinical and biochemical outcomes and low rates of adrenal adenoma as pathological findings (P = 0.044, 0.006, and 0.048, respectively), although there were no significant differences between U to U and B to U groups. All patients in U to B group with clinical and biochemical benefits, however, had adrenal adenoma as pathological findings and could be well differentiated from those with poor surgical outcomes via basal LI (>8.3), but not ACTH-stimulated LI. These results were similar even when we defined each group based on a cut-off value of 4 for basal LI.

Conclusions

Although PA patients in U to B group had worse surgical outcomes than did those in U to U group, basal LI could discriminate among patients with better surgical outcomes in U to B group.