A medical doctor who specializes in studying and treating diseases of the blood and blood-forming organs.
From Greek 'haima' (blood) + 'logos' (study) + '-ist' (one who practices). The term emerged in the early 20th century as blood medicine became a distinct medical specialty.
Haematologists are like detectives of the bloodstream—they can diagnose leukemia, sickle cell disease, and countless other conditions by examining a single drop of blood under a microscope, making them crucial to modern oncology.
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