
A differential diagnosis (sometimes abbreviated DDx, ddx, DD, D/Dx, or ΔΔ) is a systematic diagnostic method used to identify the presence of an entity where multiple alternatives are possible (and the process may be termed differential diagnostic procedure), and may also refer to any of the included candidate alternatives (or candidate conditio...
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http://en.wikipedia.org/wiki/Differential_diagnosis

A physician's consideration of alternative diagnoses that may explain a patient's condition.
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http://experttoxicologist.com/tcas-glossary.aspx

(from the article `diagnosis`) ...a diagnosis is called clinical decision making. The clinician uses the information gathered from the history and physical examination to develop a ...
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http://www.britannica.com/eb/a-z/d/47

How to differentiate one disorder from others that have some similar presenting characteristics.
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http://www.encyclo.co.uk/local/20898

The determination of which two or more diseases with similar symptoms is the one from which a patient is suffering from based on an analysis of the clinical data. ... (27 Sep 1997) ...
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http://www.encyclo.co.uk/local/20973

Type: Term Definitions: 1. the determination of which of two or more diseases with similar symptoms is the one from which the patient is suffering, by a systematic comparison and contrasting of the clinical findings. Synonyms: differentiation2
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http://www.medilexicon.com/medicaldictionary.php?t=24388

Differential diagnosis: The process of weighing the probability of one disease versus that of other diseases possibly accounting for a patient's illness. The differential diagnosis of rhinitis (a runny nose) includes allergic rhinitis (hayfever), the abuse of nasal decongestants and, of course, the common cold.
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http://www.medterms.com/script/main/art.asp?articlekey=2991

[
n] - a systematic method of diagnosing a disorder (e.g., headache) that lacks unique symptoms or signs
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http://www.webdictionary.co.uk/definition.php?query=differential%20diagnosi
noun a systematic method of diagnosing a disorder (e.g., headache) that lacks unique symptoms or signs
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https://www.encyclo.co.uk/local/20974

Deciding on the most likely cause of a particular set of symptoms and ruling out other possible causes.
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https://www.encyclo.co.uk/local/21603

A possible cause for a patient's problem. Also called a rule out.
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https://www.encyclo.co.uk/local/22445

Differential diagnoses are also known as rule-outs and are possible causes for the problems displayed by a patient. For example, kidney failure is one possible cause for polyuria in a dog or cat.
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The clinical evaluation of possible causes of dementia to rule out all other factors before settling on Alzheimers disease as a diagnosis.
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https://www.encyclo.co.uk/local/23246
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