Objective: To investigate the effects of atopic diseases on nevus development during childhood. Design: A descriptive survey of nevi in a cohort of 8-and 9-year-old children combining a skin examination and a validate...Objective: To investigate the effects of atopic diseases on nevus development during childhood. Design: A descriptive survey of nevi in a cohort of 8-and 9-year-old children combining a skin examination and a validated questionnaire regarding atopic dermatitis, allergic rhinoconjunctivitis, and bronchial asthma. Setting: Fifty-one primary schools in Sweden. Participants: A total of 788 childrenborn in 1992 participated in 1999 in a prevalence study of allergic diseases. The present study was restricted to the 545 children from that study who were still living in the community, and 515 (94%) of them participated. The cumulative incidence of atopic dermatitis, allergic rhino-conjunctivitis, and bronchial asthma was 24%, 12%, and 13%, respectively, from birth to age 7 years as reported by questionnaire; 3%reported all 3 diagnoses. Results: Children with reported atopic dermatitis and findings of active dermatitis on examination had fewernevi(median,4;mean,7.4)thanchildrenwithnoreported atopic disease and no active dermatitis found on examination (median, 9; mean, 11.2) (P < .001). Children who developed active atopic dermatitis after the questionnaire was filled out (ie, during the last 2 years) had fewer nevi than children with no atopic disease (median, 3; mean, 5.3) (P < .001). There was no difference in nevus number between the children with bronchial asthma or allergic rhinoconjunctivitis and children with no atopic disease. Conclusion: Children with atopic dermatitis had few melanocytic nevi, which suggests that the proinflammatory cytokine network in the atopic skin might inhibit melanocyte growth and/or progression to nevi.展开更多
The naevus profile was examined in a Swedish cohort of 8-9-year-old children; 524/545 individuals (96%) were examined (279 boys and 245 girls). There was a wide variation in the total number of naevi (0-79) and boys h...The naevus profile was examined in a Swedish cohort of 8-9-year-old children; 524/545 individuals (96%) were examined (279 boys and 245 girls). There was a wide variation in the total number of naevi (0-79) and boys had more naevi than girls (median 9 and 7, respectively, P < 0.01). No dysplastic naevi were found. Overall, 15/524 (3%) had at least one lesion clinically diagnosed as a congenital melanocytic naevus. Boys hadmore naevi on the face (median 1) and trunk (median 5) than girls (median 0 and 3, respectively, P < 0.001). There was no difference in the number of naevi on the legs between the two sexes. The highest counts per unit surface area for both sexes were found on the back, chest and the lateral aspect of the arms, areas intermittently sun-exposed. Children with fair skin and light eye colours had significantly more naevi than those with darker colours but children with red hair had very few naevi. Children with one or more naevi on the buttocks (25%), dorsal surfaces of the feet (11%) or on the scalp (7%) had twice as many naevi in total compared with those without naevi in these regions. Children with naevi in all three regions (0.8%) had four times as many naevi in total. A relationship between total counts and counts on the back or lateral aspect of the arms was found (r2=0.59). Either of these two areas might be suitable for predicting total naevus counts.展开更多
文摘Objective: To investigate the effects of atopic diseases on nevus development during childhood. Design: A descriptive survey of nevi in a cohort of 8-and 9-year-old children combining a skin examination and a validated questionnaire regarding atopic dermatitis, allergic rhinoconjunctivitis, and bronchial asthma. Setting: Fifty-one primary schools in Sweden. Participants: A total of 788 childrenborn in 1992 participated in 1999 in a prevalence study of allergic diseases. The present study was restricted to the 545 children from that study who were still living in the community, and 515 (94%) of them participated. The cumulative incidence of atopic dermatitis, allergic rhino-conjunctivitis, and bronchial asthma was 24%, 12%, and 13%, respectively, from birth to age 7 years as reported by questionnaire; 3%reported all 3 diagnoses. Results: Children with reported atopic dermatitis and findings of active dermatitis on examination had fewernevi(median,4;mean,7.4)thanchildrenwithnoreported atopic disease and no active dermatitis found on examination (median, 9; mean, 11.2) (P < .001). Children who developed active atopic dermatitis after the questionnaire was filled out (ie, during the last 2 years) had fewer nevi than children with no atopic disease (median, 3; mean, 5.3) (P < .001). There was no difference in nevus number between the children with bronchial asthma or allergic rhinoconjunctivitis and children with no atopic disease. Conclusion: Children with atopic dermatitis had few melanocytic nevi, which suggests that the proinflammatory cytokine network in the atopic skin might inhibit melanocyte growth and/or progression to nevi.
文摘The naevus profile was examined in a Swedish cohort of 8-9-year-old children; 524/545 individuals (96%) were examined (279 boys and 245 girls). There was a wide variation in the total number of naevi (0-79) and boys had more naevi than girls (median 9 and 7, respectively, P < 0.01). No dysplastic naevi were found. Overall, 15/524 (3%) had at least one lesion clinically diagnosed as a congenital melanocytic naevus. Boys hadmore naevi on the face (median 1) and trunk (median 5) than girls (median 0 and 3, respectively, P < 0.001). There was no difference in the number of naevi on the legs between the two sexes. The highest counts per unit surface area for both sexes were found on the back, chest and the lateral aspect of the arms, areas intermittently sun-exposed. Children with fair skin and light eye colours had significantly more naevi than those with darker colours but children with red hair had very few naevi. Children with one or more naevi on the buttocks (25%), dorsal surfaces of the feet (11%) or on the scalp (7%) had twice as many naevi in total compared with those without naevi in these regions. Children with naevi in all three regions (0.8%) had four times as many naevi in total. A relationship between total counts and counts on the back or lateral aspect of the arms was found (r2=0.59). Either of these two areas might be suitable for predicting total naevus counts.
