Pityriasis (tinea) versicolor is a benign, superficial, common fungal infection localized to the stratum corneum.
It occurs most commonly in postpubertal individuals when the sebaceous glands are the most active.
Facial involvement is common in adolescents, but lesions are also found on the upper trunk, neck, arms, dorsum of the hand and pubis.
Patient presents with erythematous, hypo- or hyperpigmented macules or patches that may have a slight scale.
It is caused by the lipophilic yeast Malassezia furfur.
Among adolescents who have only received diphtheria, tetanus toxoids, acellular pertussis (DTaP) vaccines in childhood, tetanus toxoid, reduced diphtheria toxoid, and acellular pertussis (Tdap) vaccine provides moderate protection against pertussis during the first year and then wanes rapidly thereafter.
Despite the prevalence of corticosteroid use in infants with bronchiolitis, data on its efficacy is insufficient. In this study, oral dexamethasone was compared with placebo in the treatment of bronchiolitis.