| hand-and-foot syndrome | <syndrome> Recurrent painful swelling of the hands and feet occurring in infants and young children with sickle cell anaemia. Synonym: sickle cell dactylitis. (05 Mar 2000) |
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| hand-foot-and-mouth disease | <infectious disease> Hand, foot and mouth disease is a mild, highly infectious viral disease of children, characterised by vesicular lesions in the mouth and on the hands and feet. Occurs most often in young children (under 3) and is transmitted via close contact. Outbreaks occur most often in the spring. Usually begins as a throat infection (pharyngitis) that later includes a rash (blisters) on the hands, feet and diaper area. Blisters may also appear on the throat and in the mouth. Other features include anorexia, headache and fever. The illness is typically self-limited, lasting 5-7 days. There is no specific treatment other than general supportive care. An exanthematous eruption of small, pearl-gray vesicles of the fingers, toes, palms, and soles, accompanied by often painful vesicles and ulceration of the buccal mucous membrane and the tongue and by slight fever; the disease lasts 4 to 7 days, and is usually caused by Coxsackie virus type A-16, but other types have been identified. (05 Mar 2000) |
| hand-foot-and-mouth disease virus | The virus causing hand-foot-and-mouth disease; chiefly type A16 but also types A4, A5, A7, A9, or A10 Entervirus coxsackievirus. (05 Mar 2000) |
| perceptual defense | Selective perceiving such that the individual protects himself from becoming aware of something unpleasant or threatening, e.g., obscene words are not heard correctly, or violent acts are not seen accurately. (12 Dec 1998) |
| civil defense | Preventive emergency measures and programs designed to protect the individual or community in times of hostile attack. (12 Dec 1998) |
| screen defense | The use of falsified or incomplete memories or affects to cover repressed but associated memories and affects. (05 Mar 2000) |
| defense | The psychological mechanisms used to control anxiety, e.g., rationalization, projection. Origin: L. Defendo, to ward off (05 Mar 2000) |
| defense mechanism | A psychological means of coping with conflict or anxiety, e.g., conversion, denial, dissociation, rationalization, repression, sublimation, the psychic structure underlying a coping strategy, immunological mechanism vs. Non-specific defense mechanism. (05 Mar 2000) |
| defense mechanisms | Unconscious process used by an individual or a group of individuals in order to cope with impulses, feelings or ideas which are not acceptable at their conscious level; various types include reaction formation, projection and self reversal. (12 Dec 1998) |
| defense reflex | Automatic reactions of an animal, e.g., raising of hair or feathers, dilation of the pupils, or baring of claws, when alarmed. (05 Mar 2000) |
| insanity defense | A legal concept that a person cannot be convicted of a crime if he lacked criminal responsibility by reason of insanity, which term is defined as a matter of law. (12 Dec 1998) |
| paraganglioma, extra-adrenal | A relatively rare, usually benign neoplasm originating in the chemoreceptor tissue of the carotid body, glomus jugulare, and aortic bodies. It consists histologically of rounded or ovoid hyperchromatic cells that tend to be grouped in an alveolus-like pattern within a scant to moderate amount of fibrous stroma and a few large thin-walled vascular channels. They are uncommon before the age of 20, with a female predominance in some series. (12 Dec 1998) |
| extra | 1. Something in addition to what is due, expected, or customary; something in addition to the regular charge or compensation, or for which an additional charge is made; as, at European hotels lights are extras. 2. <prefix> Without, outside of. Source: Websters Dictionary (21 Jun 2000) |
| extra-abdominal desmoid | A deep-seated firm tumour, most frequently occurring on the shoulders, chest, or back of young men or women, consisting of collagenous fibrous tissue that infiltrates surrounding muscle; frequently recurs but does not metastasize. (05 Mar 2000) |
| extra-anatomic bypass | A vascular bypass that does not conform to the preexisting anatomy. (05 Mar 2000) |