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Variant of etiology.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.


(1) As commonly used in medical practice, cause.
(2) A branch of knowledge concerned with the causes of particular phenomena; specifically, a branch of medical science concerned with the causes and origins of diseases. This definition is rarely used in the working parlance.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.


1. The science and study of the causes of disease and their mode of operation.
Compare: pathogenesis
2. The science of causes, causality; in common usage, cause.
Synonym(s): aetiology.
[G. aitia, cause, + logos, treatise, discourse]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012


The cause of a disease. This may involve many factors, including susceptibility arising from a hereditary tendency or genetic cause, environmental factors, previous related illness, unwise or unhealthy lifestyle, exposure to infective agents, and so on. The term is derived from the Greek aitia , a cause and logos , a discourse. Compare PATHOGENESIS.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005




the study of causes (usually of a disease).
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005


The cause or origin of a disease. Note: also spelt etiology. See diagnosis; epidemiology.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann

Patient discussion about aetiology

Q. how is depression caused by having cancer treated? I mean not only the patient, also the family members who tend to get depressed by the situation. how can you treat thi skind of depression?

A. thanks guys, you are great. Nice to have such a community here.

Q. What causes fibromyalgia? Is fibromyalgia a deadly disease?

A. The causes of fibromyalgia are not known. But there are many theories such as abnormalities in brain chemicals, infections, trauma, genetics and hormonal changes. Factors such as poor sleep, fatigue, overexertion and anxiety, may aggravate the symptoms. Fibromyalgia is not a progressive or life-threatening condition, but it affects quality of life. Fibromyalgia is only a disorder of muscles and not a disease.

Q. Is that true that mouth sores are caused by lack of vitamins? I’ve been having white mouth sores in the past 6 months or so. Could that mean I have to take vitamin supplements?

A. yup ... autoimmune reactions means your immune system is not working well
it's not working well because it lacks the nutrient and vitamins it needs to function properly
- take lots of vitamin c to boost your immune system
- organic multivitamins
- organic juices high in anti oxidants
- and most important .. omega 3-6-9

More discussions about aetiology
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References in periodicals archive ?
Etiologies and outcomes of status epilepticus in children.
([section]) The five outbreaks categorized as having multiple etiologies included outbreaks of 1) Shigella and Plesiomonasshigelloides; 2) Shigella, norovirus, and Yersinia enterolytica; 3) Shigella, Campylobacter, and norovirus; 4) Shigella, Escherichia coli, and Plesiomonas shigelloides; and 5) Giardia and norovirus.
The trend in ODE stroke is less concerning due to its lower proportion and its uncommon etiologies. The trend in UE stroke was stable in previous articles.
Myelopathy which does not occurs due to compressive etiologies such as tumors, infection, and trauma falls under the category of NCM.
Interestingly, the study demonstrated that arterial stiffness among patients who develop ESRD due to modifiable etiologies, such as diabetes and hypertension, is significantly higher than among those with hereditary, nonmodifiable causes.
The four more common etiologies of erythroderma are eczema,psoriasis, drugs and cutaneous lymphoma.3
Living and eating habits in our county are similar to Italy and other Mediterranean countries and that explains the equal distribution of etiologies and other epidemiological characteristics.
Smiley of Columbia University in New York questioned the reliability of coding of postpartum hemorrhage etiologies in the register used for the study.
When comparing the percentage of outbreaks occurring in school settings by etiology, outbreaks of unknown (unconfirmed) etiology consistently accounted for the highest percentage of outbreaks followed by confirmed viral, bacterial, chemical, and parasitic etiologies (Figure 1).
Varicella encephalitis (226 admissions or 3.8%) and Toxoplasma meningoencephalitis (221 admissions or 3.7%) were also common known etiologies. The etiology of 4,126 admissions (69.6% of total admissions) was unknown.
Although it may be related with a variety of etiologies approximately 50% of aneurysms are associated with congenital heart diseases mostly due to pulmonary hypertension (2, 5).
They also examined diagnosis codes for potential etiologies. They were able to identify an etiology in approximately 60% of 7,346 patients 21 years old or younger in the database.