Screening for malignant melanoma using instant photography

Objective-To assess the use of instant photography, in addition to clinical grading, as a method of screening for malignant melanoma during routine he alth examinations. Setting-A health screening clinic with an average throughput of about 12 00 0 patients a year. Methods-Suspicious pigmented skin lesions were judged clinically using the revised seven point checklist scoring system. They were then photographed w ith a Polaroid camera and the prints were graded independently by two consu ltant dermatologists with a special interest in malignant melanoma. A copy of the print was also given to the patient to keep for observation of any c hange in the lesion. Results-Over a 45 month period 39 922 patients of both sexes were screened and 1052 skin lesions were clinically assessed and photographed. Fourteen m alignant melanomas were diagnosed-all, except one, were thin lesions with a good prognosis. Conclusions-The clinical opinions of non-dermatologists using the revised s even point checklist proved disappointing in screening because of the large number of benign lesions that were given high scores. Photography, on the other hand, detected 11 melanomas and succeeded in separating the majority of banal lesions from potentially malignant ones, thus greatly reducing the need for specialist referral. Nevertheless, three melanomas were missed on purely photographic grading, which emphasises the danger of placing too mu ch reliance solely on a two dimensional image. Finally, the possession of a personal copy of the photograph by the patient proved popular and led to a diagnosis of melanoma in two instances. This procedure merits further stud y.