1/2. Compositae dermatitis in childhood.Compositae dermatitis occurred in a 9-year-old boy with a strong personal and family history of atopy. Positive patch test reactions were 2 for dandelion (taraxacum officinale), false ragweed (ambrosia acanthicarpa), giant ragweed (ambrosia trifida), short ragweed (ambrosia artemisifolia), sagebrush (artemisia tridentata), wild feverfew (Parthenium hysterophorus), yarrow (achillea millifolium), and tansy (Tanacetum vulgare) and 1 for dahlia species and English ivy (hedera helix). patch tests were negative for another 30 plants, including cocklebur (xanthium strumarium), dog fennel (anthemis cotula, fleabane (erigeron strigosus), sneezeweed (Helenium autumnale), and feverfew (tanacetum parthenium). The eruption resembled atopic dermatitis morphologically but was prominent on the palms and face and dramatically spared the area of the boy's feet covered by his shoes. The condition has always been seasonal, worsening in summer, especially July, and it clears on avoidance of contact. This case is believed to represent a contact dermatitis to oleoresins of Compositae plants; inhalants as a cause of systemic aggravation are not likely to be important in this patient.- - - - - - - - - - ranking = 1keywords = ivy (Clic here for more details about this article) |
2/2. erythema multiforme associated with contact dermatitis to poison ivy: three cases and a review of the literature.erythema multiforme (EM) is a hypersensitivity reaction that occurs mainly after exposure to certain medications or in the setting of infection, most commonly that due to herpes simplex virus. Rare cases of EM have been reported after allergic contact dermatitis due to various substances. There has been one case in the literature of EM following rhus contact dermatitis. We report three patients who developed EM after allergic contact dermatitis due to poison ivy. In all three patients, targetoid lesions developed primarily on the palms and soles, either after a brief course of prednisone or during its taper. Two of the patients have had more than one episode of EM after poison ivy dermatitis. Although EM has been described after allergic contact dermatitis due to a variety of antigens (nickel being the most common), there is only one report in the literature of EM following rhus contact dermatitis. Given the prevalence of allergic contact dermatitis due to poison ivy, this may be an under-reported complication.- - - - - - - - - - ranking = 7keywords = ivy (Clic here for more details about this article) |