Pheochromocytoma

Part of speech: noun

Definitions

1. A rare type of tumor derived from adrenal gland chromaffin cells, which secretes catecholamines and can result in high blood pressure and other health issues
2. This uncommon malignancy originates from hormone-secreting cells and is known to cause hypertension and associated symptoms due to hormone overproduction
3. A rare neoplasm arising from adrenal medulla cells that produces catecholamines, leading to episodes of increased blood pressure and various related symptoms

Etymology: Ludwig Pick, a German pathologist, coined the term in 1912 for a tumour he had been studying in the adrenal glands. The name is built from "pheochromocyte," a cell that turns dark when treated with chromium salts, so the word literally describes a growth made of such cells. Its parts are "pheo-," meaning dusky or dark, "chrome," meaning colour, "cyte," meaning cell, and the suffix "-oma," used for tumours. The word is a compound rather than a single borrowed term. Its first half points to a staining reaction: when adrenal tissue is exposed to chromium salts, it darkens to a dusky brown, which made the cells easy to identify under a microscope. The later parts of the name were added to specify the cell type and the kind of growth, following the same pattern used across medical vocabulary for naming tumours by their tissue of origin.