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. 2022 Jul 3;6(9):bvac105.
doi: 10.1210/jendso/bvac105. eCollection 2022 Sep 1.

Systematic Review: Incidence of Pheochromocytoma and Paraganglioma Over 70 Years

Abdul Rahman Al Subhi  1 , Veronica Boyle  1 , Marianne S Elston  1
Affiliations

Systematic Review: Incidence of Pheochromocytoma and Paraganglioma Over 70 Years

Abdul Rahman Al Subhi et al. J Endocr Soc. .

Abstract

Context: Pheochromocytomas and paragangliomas (PPGLs) are known to be rare. However, there is scant literature reporting their epidemiology, particularly whether the diagnosis of PPGL has increased with advances in medical imaging and biochemical and genetic testing.

Objective: The primary objective of this systematic review was to determine the annual incidence of PPGLs and change over time.

Design: A systematic review was performed. Medline, Embase, PubMed, and Web of Science Core Collection databases were searched to identify studies reporting PPGL incidence. Studies were eligible for inclusion from the database's inception until August 30, 2021.

Results: A total of 6109 manuscripts were identified; 2282 duplicates were excluded, and a further 3815 papers were excluded after abstract and/or full text review. Twelve studies were included in the final review. The incidence of PPGL ranged from 0.04 to 0.95 cases per 100 000 per year. Incidence increased over time, from approximately 0.2/100,000 individuals in studies performed before 2000, to approximately 0.6/100,000 in studies undertaken after 2010. The mode of diagnosis changed over the same time period, with more patients diagnosed from incidental imaging findings, and fewer at autopsy or from symptoms.

Conclusion: The annual incidence of PPGL has increased over time. Much of this increase is likely from incidental identification of tumors on imaging. However, the epidemiology of PPGL remains understudied, in particular, in associations with altitude, ethnicity, and genetics. To improve early detection and management guidelines, these gaps should be addressed.

Keywords: epidemiology; incidence; paraganglioma; pheochromocytoma.

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Figures

Figure 1.
Figure 1.
PRISMA flow chart.
Figure 2.
Figure 2.
Annual incidence of PPGL 1949 to 2018.
See this image and copyright information in PMC

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