Biomedical subjects
E F Elst
Publications and source records attributed to E F Elst.
Diagnostic tests in children with atopic dermatitis and food allergy.
BACKGROUND: Skin testing is a common diagnostic procedure in food allergy. The skin prick test is the test of first choice for investigating the immediate IgE-mediated reaction. The skin application food test (SAFT) has been developed on the basis of the mechanism of the contact urticaria syndrome (CUS). METHODS: We studied the relevance of the SAFT in children younger than 4 years with atopic dermatitis and (suspected) food allergy as compared with the prick-prick test, the radioallergosorbent test (RAST), and the oral challenge. In the skin tests, we used fresh food, in the same state as it was consumed. RESULTS: There was a good agreement between the SAFT and the prick-prick test. A moderate agreement was observed between the SAFT and the serologic test (RAST). Significantly more positive results in the RAST were observed than in the SAFT. There was very good agreement between the SAFT and the oral challenge (kappa = 0.86). CONCLUSIONS: The SAFT is a reliable and child-friendly skin test for evaluating (suspected) food allergy in children younger than 4 years with atopic dermatitis. The very good correlation with the oral challenge indicates that one may probably consider the SAFT a "skin provocation" in children younger than 4 years.
Treatment of linear scleroderma with oral 1,25-dihydroxyvitamin D3 (calcitriol) in seven children.
Linear scleroderma is a connective tissue disorder that characteristically involves the skin. Skin induration and pigmentary changes present in a linear distribution. Severe functional and cosmetic disability may occur, especially in growing children. No effective therapy for the fibrotic stage of scleroderma is available at present. Recently a beneficial effect of oral 1, 25-dihydroxyvitamin D3 (calcitriol) treatment was reported in adults. Calcitriol has a dose-dependent inhibition on fibroblast proliferation and collagen synthesis and has immunoregulatory activities. We assessed the efficacy of oral calcitriol treatment in seven pediatric patients with linear scleroderma. During the treatment dietary calcium intake was restricted. Calcium, inorganic phosphate, creatinine, and urea in the serum and urine was monitored. The urinary calcium:creatinine ratio was measured. The effects of the treatment were evaluated using a clinical scoring system. No side effects were observed. Five of the seven patients showed a good to excellent improvement of their lesions. One of them partly relapsed after 19 months, but showed an excellent response to a second therapy session with calcitriol. One patient with rapidly progressive disease failed to respond to therapy. Our results indicate that calcitriol can be an effective agent for treating localized scleroderma in children.