Core Healthcare Terms
Learn foundational healthcare terms and find fuller explanations of how they are used.
#Medical words need their context
MedlinePlus's understanding-medical-words tutorial illustrates how patients and clinicians can use similar words with different meanings. Its introduction distinguishes familiar everyday wording from more specific medical descriptions. A shared word does not always mean a shared understanding.
Ask for a term to be explained in ordinary language and in the context where it was used. This page introduces selected concepts, not a complete medical dictionary. Understanding a label does not establish that the label applies to your health.
Evidence: MedlinePlus: understanding medical words, introduction
#Diagnosis is a process of identification
The National Cancer Institute's dictionary defines diagnosis as the process of identifying a disease, condition or injury from signs and symptoms. It says health history, physical examination and tests may help make a diagnosis. The definition describes a process, not a conclusion that can be drawn merely from reading a matching description.
A symptom description is information to discuss, not a diagnosis by itself. The National Institute on Aging advises explaining when symptoms began, how long and how often they occur, whether they are changing and how they affect usual activities. These observations can help a clinician understand the concern without requiring you to name its cause.
Evidence: NCI dictionary: diagnosis / National Institute on Aging: what to tell the doctor
#Screening is not the same question as diagnosis
The National Cancer Institute defines screening as checking for disease when there are no symptoms. Its examples concern cancer screening, and the definition also mentions genetic testing for risk of inherited disease. Diagnosis, by contrast, concerns identifying a disease, condition or injury using the relevant information.
The purpose of a test matters when you read about it or ask why it was suggested. A definition does not tell you which test you need, whether to have it or how to interpret your result. Ask your clinician what question the test is intended to answer. This page supplies no testing recommendation or personalised interpretation.
Evidence: NCI dictionary: screening / NCI dictionary: diagnosis
Source note
The sections above were checked against the linked sources. No clinical review has been performed. This is general research education, not a clinical guideline.