functional disease

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1. pertaining to or fulfilling a function.
2. affecting the function but not the structure.
functional disease (functional disorder) a disease or disorder of physiological function having no known organic basis. Although not strictly correct, the term is often used in psychiatry for disorders that are psychogenic and in other branches of medicine to refer to any that are idiopathic.
functional method a type of nursing care delivery system; see nursing practice.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

func·tion·al dis·or·der

a disorder characterized by physical symptoms with no known or detectable organic basis. See: behavior disorder, neurosis.
Farlex Partner Medical Dictionary © Farlex 2012

func·tion·al dis·or·der

, functional disease (fŭngk'shŭn-ăl dis-ōr'dĕr, di-zēz')
Disease characterized by physical symptoms with no known or detectable organic basis.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
Functional diseases are conditions that have signs and symptoms of a real physical disease but no identifiable physical cause.
Many organic and functional diseases can cause chronic abdominal pain.
The clinical meaning of functional gastrointestinal symptoms in different states separator is shown in Table 1, it can result in reliable recognition and better treatment.(21) The overall grouping of functional diseases of the stomach is given in Table 1.
Also, there are other diseases which had not a very clear relationship with psychosomatic like diseases with a specific anatomic and biologic lesion, functional diseases, somatic consequences of some disorders of the behavior or instincts, somatic diseases comorbid with an affective disorder.

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