Understanding Lab Tests for Pheochromocytoma
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Pheochromocytoma is a rare tumor that develops in the adrenal glands, typically producing excessive amounts of catecholamines (stress hormones like epinephrine and norepinephrine). This condition can cause dangerous spikes in blood pressure, along with symptoms such as excessive sweating, rapid heartbeat, and severe anxiety. Blood testing plays a crucial role in diagnosing this condition by measuring elevated hormone levels.
Recommended Test
Catecholamines, Fractionated, Plasma (Dopamine)
This blood test measures the levels of catecholamines (including dopamine, epinephrine, and norepinephrine) in the plasma. Pheochromocytoma tumors typically produce excessive amounts of these hormones, so elevated levels can indicate the presence of this rare tumor and help explain symptoms like high blood pressure, excessive sweating, rapid heartbeat, and anxiety.
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Diagnosing Pheochromocytoma Through Blood Testing
Because pheochromocytoma symptoms can mimic other conditions like anxiety disorders or heart problems, laboratory testing is essential for accurate diagnosis. Measuring catecholamine levels in the blood helps confirm whether a tumor is producing excess hormones, which is the hallmark of this condition.
Understanding Your Results
Elevated catecholamine levels may suggest the presence of pheochromocytoma, but additional imaging studies are typically needed to locate the tumor. Your healthcare provider will interpret your results in the context of your symptoms and medical history to determine the appropriate next steps for diagnosis and treatment.
Important Considerations
The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for diagnosis and treatment.
