Bilateral adrenal medullary hyperplasia: a clinicopathological entity

Area of Science:

• Endocrinology
• Cardiology
• Pathology

Background:

• Hypertension and myocardial infarction are common cardiovascular conditions.
• Phaeochromocytoma is a rare tumor causing secondary hypertension.
• Adrenal medullary hyperplasia is a less understood condition with potential links to hypertensive crises.

Purpose of the Study:

• To describe a case of a patient presenting with symptoms suggestive of phaeochromocytoma.
• To investigate the underlying cause of a hypertensive crisis in a patient with pre-existing cardiovascular disease.
• To explore the diagnostic criteria and pathological findings of primary adrenal medullary hyperplasia.

Main Methods:

• Clinical case presentation and patient history.
• Laboratory analysis of urinary steroids (17-OHCS, 17-ketosteroids, 3-methoxy-4-hydroxymandelic acid).
• Morphometric analysis of adrenal glands post-necropsy using Dobbie's technique.

Main Results:

• Patient exhibited symptoms of a hypertensive crisis including sudden blood pressure increase, perspiration, loss of consciousness, and ventricular fibrillation.
• Initial urinary assays showed slightly elevated 17-OHCS and 17-ketosteroids, with normal 3-methoxy-4-hydroxymandelic acid, but later showed markedly increased levels during the crisis.
• Necropsy revealed myocardial infarction but no phaeochromocytoma; however, adrenal gland morphometry indicated primary adrenal medullary hyperplasia.

Conclusions:

• The case highlights the diagnostic challenges in differentiating phaeochromocytoma from other causes of hypertensive crises.
• Primary adrenal medullary hyperplasia, though difficult to demonstrate previously, is presented as a potential cause of such events.
• This study contributes to the understanding and diagnostic criteria for primary adrenal medullary hyperplasia.