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Related Experiment Videos

Pheochromocytoma without hypertension

L Smircić1, T Susković, Z Ferencić

  • 1Department of Internal Medicine, Clinical Hospital Sestre Milosrdnice, Zagreb, Croatia.

Journal of Internal Medicine
|April 1, 1994
PubMed
Summary

This case study highlights a rare pheochromocytoma in a normotensive patient. The tumor predominantly secreted adrenaline, leading to unusual clinical presentation and normal blood pressure post-surgery.

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Area of Science:

  • Endocrinology
  • Oncology
  • Nephrology

Background:

  • Pheochromocytoma is a rare neuroendocrine tumor arising from chromaffin cells, typically presenting with hypertension.
  • Diagnosis often relies on detecting elevated urinary or plasma catecholamines and their metabolites.

Observation:

  • A patient presented with a palpable abdominal mass but remained normotensive during hospitalization.
  • Urinary adrenaline levels were notably higher than noradrenaline levels, contradicting typical pheochromocytoma profiles.
  • Cytological findings were inconsistent with the initial clinical suspicion of pheochromocytoma.

Findings:

  • Surgical intervention revealed a tumor, with subsequent pathohistologic examination confirming pheochromocytoma.
  • Post-operatively, the patient's urinary catecholamine levels normalized.
  • The patient's normotensive state during observation was potentially due to the tumor's predominant secretion of adrenaline and possible vasodilating substances.

Implications:

  • This case expands the clinical spectrum of pheochromocytoma presentation, emphasizing the possibility of normotension.
  • It underscores the importance of considering pheochromocytoma even in the absence of hypertension, particularly with elevated adrenaline.
  • Understanding tumor-specific catecholamine secretion patterns is crucial for accurate diagnosis and management of pheochromocytoma.

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