Pheochromocytoma Associated with Nocturnal Hypertension

Yuichiro ISHIYAMA; Teruhiko OHGI; Toshihiro KITA; Akira SASAKI; Kazuo KITAMURA; Osamu KIDA; Terukazu KAWASAKI; Tanenao ETO

doi:10.2169/internalmedicine.32.781

Yuichiro ISHIYAMA, Teruhiko OHGI, Toshihiro KITA, Akira SASAKI, Kazuo KITAMURA, Osamu KIDA, Terukazu KAWASAKI, Tanenao ETO

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Keywords: blood pressure monitors, catecholamines, circadian rhythm, neuropeptide Y

JOURNAL FREE ACCESS

1993 Volume 32 Issue 10 Pages 781-783

DOI https://doi.org/10.2169/internalmedicine.32.781

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Abstract

Pheochromocytoma is often associated with paroxysmal hypertension. Wereport a 49-yearold woman with pheochromocytoma whose blood pressure (BP) was elevated regularly only at night. Plasma norepinephrine (NE) and neuropeptide Y (NPY) concentrations increased in parallel with the elevation of BP. After resection of the adrenal tumor, these circadian changes disappeared. Plasma NE and NPY, especially the former, from the tumor were considered to be the cause of this unusual fluctuation in BP.
(Internal Medicine 32: 781-783, 1993)

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