Related Experiment Video
Updated: Aug 13, 2026

A Novel Method: Super-selective Adrenal Venous Sampling
Published on: September 15, 2017
Acute appendicitis in a patient with undiagnosed pheochromocytoma
Nicki S Tarant1, Rhodel G Dacanay, Brian W Mecklenburg
1Department of Anesthesiology, Naval Medical Center San Diego, San Diego, California 92134-1005, USA.
Abstract:
Pheochromocytoma is a rare catecholamine-producing tumor that can cause severe hypertension and other systemic disturbances. A clinical challenge arises when a patient with a previously undiagnosed and untreated pheochromocytoma presents with a surgical emergency. We describe a patient presenting with acute appendicitis in whom surgery was cancelled because of suspected pheochromocytoma. The possibility of mortality associated with surgery in a patient with an undiagnosed pheochromocytoma outweighed the risk of nonoperative management for appendicitis. This case resulted in a nonoperative resolution of appendicitis and an unremarkable recovery once appropriate hypertension treatment was administered.
Related Concept Videos
Appendicitis-I: Introduction
Etiology: Appendicitis can arise from various causes, primarily rooted in the obstruction of the appendix lumen. Factors contributing to this obstruction include fecal accumulation, lymphoid hyperplasia and, in...
Appendicitis
Appendicitis-II: Diagnostic Studies and Management
Diagnosing Appendicitis
It requires a multifaceted approach, starting with a detailed physical examination to pinpoint the location and nature of the pain and identify any associated symptoms. Laboratory tests play a crucial role. A complete Blood Count (CBC) typically reveals leukocytosis (an increased number of...
Peptic Ulcer
Acute Pancreatitis II: Clinical Manifestations and Management
Peptic Ulcer Disease I: Introduction
An acute ulcer, marked by superficial erosion and minimal inflammation, swiftly resolves upon identifying and addressing the underlying cause. In contrast, a chronic ulcer persists, potentially eroding through the muscular wall and forming fibrous tissue.
Peptic ulcers can also be...