title: Seasonal variations of pigmented naevi. Intercorrelations of clinical and histological variables with special reference to seasonal variation.
abstract: During 1984, junctional and compound naevi were registered significantly more often during the summer half-year (May-October) than the total number of naevi, which showed no seasonal variation. A series of 342 of these junctional and compound naevi have been the subject of a blind histological classification. Clinical information was obtained by a questionnaire mailed to the patients. The intercorrelations of 19 histological and 10 clinical variables were studied by chi 2-test. The seasonal variation of these variables was further studied by chi 2-test and by Hewitt's test. Patient's hair colour, eye colour and sex as well as mitoses and localization showed a significant correlation to season of the year. The trends of these findings, compared with the information about tumour duration, indicate a short-term latency effect of UV light on naevi which are excised during the summer half-year.
authors.affiliation: Department of Pathology, Ullevaal Hospital, Oslo, Norway.
authors.forename: T E
authors.initials: TE
authors.lastname: Larsen
authors.forename: S B
authors.initials: SB
authors.lastname: Mogensen
authors.forename: I
authors.initials: I
authors.lastname: Holme
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002675:Child, Preschool; D005127:Eye Color; D005260:Female; D006200:Hair Color; D006801:Humans; D008297:Male; D008875:Middle Aged; D009508:Nevus, Pigmented / Q000453:epidemiology* / Q000473:pathology; D009664:Norway / Q000453:epidemiology; D012621:Seasons; D012737:Sex Factors; D011795:Surveys and Questionnaires; D013997:Time Factors