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Functioning metastases of a nonfunctioning paraganglioma.

J Fernandez-Llamazares1, M Sabrià-Leal, M Armengol-Carrasco

  • 1Serveis de Cirurgia General i de Medicina Interna, Hospital Germans Trias i Pujol, Badalona Universitat Autònoma de Barcelona, Spain.

Journal of Surgical Oncology
|March 1, 1988
PubMed
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A nonfunctioning paraganglioma initially deemed benign transformed into a functioning metastatic tumor. This case highlights tumor cell phenotypic heterogeneity as a key factor in paraganglioma behavior.

Area of Science:

  • Endocrinology
  • Oncology
  • Pathology

Background:

  • Paragangliomas are rare neuroendocrine tumors arising from sympathetic or parasympathetic ganglia.
  • Distinguishing between benign and malignant paragangliomas preoperatively can be challenging.
  • Functional status (hormone secretion) and metastatic potential are critical clinical parameters.

Observation:

  • A case of a nonfunctioning paraganglioma initially classified as benign is presented.
  • Two years post-excision, the patient developed functioning bone and lung metastases.
  • Clinical manifestations included hypertensive crises and elevated urinary vanilmandelic acid and catecholamines.

Findings:

  • The metastatic lesions exhibited functional activity, secreting catecholamines.

Related Experiment Videos

  • This case demonstrates a potential for functional transformation from a nonfunctioning to a functioning phenotype.
  • Phenotypic heterogeneity within the primary tumor cells is proposed as the underlying mechanism.

    • Implications:

    • The findings challenge traditional criteria for classifying paragangliomas solely based on initial presentation.
    • This case underscores the importance of long-term surveillance for potentially transforming paragangliomas.
    • Understanding tumor cell heterogeneity is crucial for predicting and managing paraganglioma behavior and treatment strategies.