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A medical triad is a group of three signs or symptoms, the result of injury to three organs, which characterise a specific medical condition. The appearance of all three signs conjoined together in another patient, points to that the patient has the same medical condition, or diagnosis.
An example of a triad is Meltzer's triad presenting purpura a rash, arthralgia painful joints, and myalgia painful and weak muscles. Meltzer's triad indicates the condition cryoglobulinemia. Huntington's disease is a neurodegenerative disease that is characterized by a triad of motor, cognitive, and psychiatric signs and symptoms. [31]
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In medicine, Garrod's tetrad is a term named for British physician Archibald Garrod, who introduced the phrase "inborn errors of metabolism" in a lecture in 1908. [ 1 ] The tetrad comprises four inherited metabolic diseases : albinism , alkaptonuria , cystinuria , and pentosuria .
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Triad (anatomy), structure in skeletal muscles, formed by a T tubule surrounded by sarcoplasmic reticulum; Triad (computing), 3 bits of information storage; Triad (environmental science), management system for environmental cleanup; Triad (monitors), group of three phosphor dots used in some computer monitors; List of medical triads, tetrads ...
The origin of the term "Virchow's Triad" is of historical interest, and has been subject to reinterpretation in recent years. [7] While both Virchow's and the modern triads describe thrombosis, the previous triad has been characterized as "the consequences of thrombosis", and the modern triad as "the causes of thrombosis". [8]
Hutchinson triad is a triad of signs that may be seen in late congenital syphilis, including: interstitial keratitis, malformed teeth (Hutchinson incisors and mulberry molars), and eighth nerve deafness. [1] [2] Late congenital syphilis typically manifests after 2 years of age. [3]