• Shu Eguchi, Rintaro Ono, Takeshi Sato, Keigo Yada, Naoki Umehara, Satoshi Narumi, Yosuke Ichihashi, Taiki Nozaki, Naoki Kanomata, Tomonobu Hasegawa, Miwa Ozawa, and Daisuke Hasegawa.
• Department of Pediatrics, St. Luke's International Hospital, Tokyo, Japan.
• Medicine (Baltimore). 2021 Nov 19; 100 (46): e27888e27888.

RationaleParaganglioma (PGL), an extra-adrenal pheochromocytoma, is a rare tumor, especially in children. While hypersecretion of catecholamines causes the classic triad of headaches, palpitations, and profuse sweating, prompt diagnosis is still challenging.Patient ConcernsFor 7 months, an 8-year-old boy complained of polyuria and weight loss, followed by proteinuria and headache for 1 month prior to admission. He was admitted to our hospital due to an afebrile seizure.DiagnosisHis blood pressure remained markedly elevated even after cessation of the convulsion. Magnetic resonance imaging of the brain revealed posterior reversible encephalopathy syndrome. Abdominal computed tomography showed a mass lesion encasing the left renal artery, measuring 41 mm in length along its major axis. The plasma and urine levels of normetanephrine were elevated. Additionally, iodine-123-metaiodobenzylguanidine scintigraphy showed an abnormal uptake in the abdominal mass with no evidence of metastasis. Based on these findings, we tentatively diagnosed him with PGL.InterventionSubstantial alpha- and beta-blocking procedures were performed, followed by a tumor resection and an extended left nephrectomy on day 31 of hospitalization. Pathological findings confirmed the diagnosis of PGL.OutcomeThe postoperative course was uneventful, and his blood pressure normalized without the use of antihypertensive agents. Genetic testing revealed a known SDHB germline mutation. The same mutation was also detected on his father and paternal grandfather without any history of hypertension or malignant tumor.LessonIt remains challenging to diagnose pheochromocytoma/paraganglioma (PPGL) promptly because PPGL can present with a variety of symptoms. Preceding symptoms of the presented case might be caused by PGL. Although PPGL is a rare disease, especially in children, it should be considered in differential diagnosis when various unexplained symptoms persist.Copyright © 2021 the Author(s). Published by Wolters Kluwer Health, Inc.

32 keywords...

hide…