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eruption

eruption (e-rup´shun)

1. A breaking out, especially the appearance of lesions on the skin. 2. A rapidly developing dermatosis of the skin or mucous membranes, especially when appearing as a local manifestation of one of the exanthemata; an e. is characterized, according to the nature of the lesion, as macular, papular, vesicular, pustular, bullous, nodular, erythematous, etc. 3. The passage of a tooth through the alveolar process and perforation of the gums. [L. e-rumpo, pp. -ruptus, to break out]
accelerated e. a dental e. pattern which is chronologically advanced in comparison with the average pattern of dental e.; e. of the first tooth occurs at an earlier age than the average, and the intervals of time between subsequent dental e.'s are shorter than the average.
butterfly e. butterfly (2)
clinical e. development of the crown of a tooth that can be observed clinically.
continuous e. the e. of a tooth into the mouth and its continuous movement in a vertical direction.
creeping e. cutaneous larva migrans
delayed e. a dental e. pattern which is chronologically late in comparison with the average pattern of dental e.; e. of the first tooth occurs at a later age than the average, and the intervals of time between subsequent dental e.'s are longer than the average.
drug e. any e. caused by the ingestion, injection, or inhalation of a drug, most often the result of allergic sensitization; reactions to drugs applied to the cutaneous surface are not generally designated as drug e., but as contact-type dermatitis.dermatitis medicamentosa, dermatosis medicamentosa, drug rash, medicinal e;
feigned e. dermatitis artefacta
fixed drug e. a type of drug e. that recurs at a fixed site (or sites) following the administration of a particular drug; the lesions usually consist of intensely erythematous and purplish, sharply demarcated macules, and occasionally of herpetic vesicles; the affected areas undergo gradual involution, but flare and enlarge on readministration of the offending drug and may become hyperpigmented.
iodine e. an acneform or follicular e. or granulomatous lesion caused by a reaction to systemic iodine or iodide administration.
Kaposi's varicelliform e. a now rare complication of vaccinia superimposed on atopic dermatitis, with generalized vesicles and vesicopapules and high fever.eczema vaccinatum;
medicinal e. drug e
passive e. the apparent continued e. of the teeth, actually the result of regression of the gingivae and crestal bone.
polymorphous light e. a common pruritic papular e. appearing in a few hours and lasting up to several days on skin exposed to shortwave ultraviolet light; subepidermal edema and deep perivascular lymphocytic infiltration is seen microscopically.
e. sequestrum (se´kwes-trum) spicule of bone overlying the central occlusal fossa of an erupting permanent molar.
serum e. urticaria seen in serum sickness.
surgical e. the uncovering of an unerupted tooth to permit its further e. into the oral cavity by surgically removing overlying soft tissue, bone, and sometimes teeth.

 

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