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1 "Ji Yun Park"
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Brief Report
Adrenal Gland
Urinary Free Metanephrines for Diagnosis of Pheochromocytoma and Paraganglioma
Jiyeon Ahn, Ji Yun Park, Gyuri Kim, Sang-Man Jin, Kyu Yeon Hur, Soo-Youn Lee, Jae Hyeon Kim
Endocrinol Metab. 2021;36(3):697-701.   Published online June 1, 2021
DOI: https://doi.org/10.3803/EnM.2020.925
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AbstractAbstract PDFSupplementary MaterialPubReader   ePub   
Background
Pheochromocytoma and paraganglioma (PPGL) is diagnosed through biochemical confirmation of excessive catecholamines in urine and plasma. Recent technological developments have allowed us to measure urinary free metanephrines; however, the diagnostic accuracy of these new methods and the diagnostic cutoff values have not been evaluated.
Methods
This is a retrospective study of 595 subjects, including 71 PPGL cases and 524 controls. PPGL was based on pathological confirmation. Subjects with no evidence of PPGL over 2 years were included in the control group.
Results
Urinary free metanephrines yielded similar area under the curve (AUC) to urinary fractionated metanephrines and plasma free metanephrines. However, urinary free normetanephrine yielded a better AUC than did urinary fractionated normetanephrine. The optimal cutoff for urinary free metanephrine and normetanephrine corrected for urinary creatinine yielded 97.2% sensitivity and 98.1% specificity.
Conclusion
Urinary free metanephrines are a reliable method for diagnosing PPGL in Asian populations compared with existing biochemical methods.

Citations

Citations to this article as recorded by  
  • Biochemical Assessment of Pheochromocytoma and Paraganglioma
    Graeme Eisenhofer, Christina Pamporaki, Jacques W M Lenders
    Endocrine Reviews.2023; 44(5): 862.     CrossRef
  • Adrenal bleeding due to pheochromocytoma - A call for algorithm
    Ewelina Rzepka, Joanna Kokoszka, Anna Grochowska, Magdalena Ulatowska-Białas, Martyna Lech, Marta Opalińska, Elwira Przybylik-Mazurek, Aleksandra Gilis-Januszewska, Alicja Hubalewska-Dydejczyk
    Frontiers in Endocrinology.2022;[Epub]     CrossRef
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