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Ectrodactyly
Ectrodactyly The congenital absence of all or part of one or more fingers or toes. The term ectrodactyly has been applied to a variety of malformations of the fingers or toes. It is probably best reserved for: transverse terminal aphalangia (absence of the last bone in the finger or toe), adactylia (total absence of a finger or toes), or acheiria (total absence of one or both hands).
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Congenital
Present at birth.
Ectrodactyly
The congenital absence of all or part of one or more fingers or toes. The term ectrodactyly has been applied to a variety of malformations of the fingers or toes. It is probably best reserved for: transverse terminal aphalangia (absence of the last bone in the finger or toe), adactylia (total absence of a finger or toes), or acheiria (total absence of one or both hands).
Bone
Bone refers either to a hardened connective tissue or to one of the individual structures, or organs, into which it is formed, found in many animals. Bones support body structures, protect internal organs, and (in conjunction with muscles) facilitate movement; are also involved with cell formation, calcium metabolism, and mineral storage. The bones of an animal are, collectively, known as the skeleton.
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Ectromelia virus
A member of the poxvirus family which is a highly virulent natural pathogen of mice that causes mousepox, a severe disease with high mortality rate in mice but does not infect humans. The complete genome sequence of ectromelia virus is known.
Ectropion
An outward turning of the eyelid.
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Ectodermal dysplasia
A genetic disorder in which there is abnormal development of the skin and associated structures (the hair, nails, teeth, and sweat glands). The most dangerous problem occurs in cases with decreased sweating due to absence of the sweat glands. Affected persons have trouble controlling fevers and being in a warm environment. The hair may also be absent or sparse. The skin tends to be thin and light in color. Problems with the lining inside the nose predispose to chronic nasal infections. The teeth may be notably absent or develop abnormally. There are a number of different types of ectodermal dysplasia. X-linked anhidrotic (non-sweating) ectodermal dysplasia is most common. As an X-linked trait, it mainly affects males. There is also an autosomal dominant form affecting males and females alike. The term "ectodermal dysplasia" refers to the abnormal development (dysplasia) of structures derived from the ectoderm, one of the germ cell layers in the embryo.
Ectomy
A surgical suffix referring to the removal of something. For example, a lumpectomy is the surgical excision of a lump which may be benign or not, tonsillectomy is the removal of the tonsils, a partial colectomy is removal of part of the colon, an appendectomy is removal of the appendix, etc.
Ectoparasite
A parasite that lives on or in the skin but not within the body. Fleas and lice are ectoparasites. Infestation with an ectoparasite is called an ectoparasitosis.
Ectoparasitosis
Infestation with an ectoparasite, a parasite that lives on or in the skin. The four major ectoparasitoses are pediculosis, scabies, cutaneous larva migrans and tungiasis (sand-flea disease).
Ectopia cordis
A type of birth defect in the heart is abnormally located. In ectopia cordis, the heart usually protrudes outside the chest.
Ectrodactyly
Ectromelia virus
A member of the poxvirus family which is a highly virulent natural pathogen of mice that causes mousepox, a severe disease with high mortality rate in mice but does not infect humans. The complete genome sequence of ectromelia virus is known.
Eczema vaccinatum
A common concern with smallpox vaccination involving the implantation of the vaccinia virus from the vaccination into the skin of a person with eczema (atopic dermatitis), sometimes with a fatal outcome. Disrupted skin permits viral implantation. Once the virus is implanted, it spreads from cell to cell producing extensive lesions. The skin lesions appear identical to a primary smallpox vaccination. Confluent lesions often cover the entire face, the crook of the elbow in the antecubital fossa, and behind the knee in the popliteal fossa. Viremia (viral spread through the bloodstream) may also occur allowing for the spread of virus to other parts of the body, including skin that is not affected by eczema. Bacterial and fungal invasion may occur as a late stage of untreated eczema vaccinatum.
Eczema, allergic contact
Also called allergic contact dermatitis, this is a red, itchy, weepy reaction where the skin has come into contact with a substance that the immune system recognizes as foreign, such as poison ivy or certain preservatives in creams and lotions.
Eczema, contact
A localized reaction that includes redness, itching, and burning where the skin has come into contact with an allergen (an allergy-causing substance) or with an irritant such as an acid, a cleaning agent or another chemical.
Eczema, dyshidrotic
Irritation of the skin on the palms of hands and soles of the feet characterized by clear, deep blisters that itch and burn.
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