What should you know about pheochromocytoma immunohistochemistry?

A pathologist examines tumour tissue with a panel of antibodies. Markers associated with neuroendocrine cells can support the diagnosis, while additional stains may help separate pheochromocytoma from other adrenal or nearby tumours. A stain is interpreted by its pattern and cellular location, not in isolation. The report is considered alongside hormone testing, imaging, symptoms such as episodes of headache or palpitations, and the microscopic appearance of the sample.

Ask whether the tissue diagnosis is complete and which findings support pheochromocytoma. Discuss biochemical testing for excess catecholamine activity and whether genetic counselling is appropriate. Before a biopsy or operation, tell the team about high blood pressure episodes, palpitations and all medicines. A biopsy is not automatically suitable for every adrenal mass, so the endocrine and surgical teams should explain the safest route to diagnosis.

Seek urgent help for severe headache with chest pain, marked sweating, a very fast or irregular heartbeat, fainting, confusion or severe breathlessness. These can signal a dangerous surge in hormone activity or another emergency. After a biopsy or procedure, promptly report fever, worsening abdominal pain, bleeding or faintness. Do not stop blood-pressure or hormone-related medicines without the prescribing team's advice.

Which markers were positive or negative, and what do they show? Is the diagnosis supported by hormone tests and imaging? Could this tumour be linked to an inherited condition? Who will coordinate endocrine, pathology and surgical care? What symptoms should trigger an emergency call?