Phacomatosis pigmentokeratotica (PPK) is a rare syndrome defined by the association of an organoid nevus occasionally with sebaceous differentiation, a speckled lentiginous nevus, and other extracutaneous anomalies. A preterm male infant of only 830 g at 27 week gestational age had an organoid nevus showing sebaceous differentiation. Also, he had multiple speckled-lentiginous nevus. Correlating...

Dermoscopy, in expert hands, increases accuracy, sensitivity and specificity in diagnosis of pigmented skin lesions of a single operator, compared with clinical examination. Simplified algorithmic methods have been developed to help less expert dermoscopists in diagnosis of melanocytic lesions. This study included 125 melanocytic skin lesions divided into melanocytic nevi, dysplastic nevi and t...

Epidemiologic research has shown convincingly that certain phenotypic attributes are associated with increased relative risks of melanoma. Although such findings have intrinsic utility, there have been few attempts to translate such knowledge into estimates of disease burden suitable for framing public health policy. We aimed to estimate the population attributable fraction (PAF) for melanoma a...

BACKGROUND Atypical nevi are a common risk factor for melanoma. OBJECTIVES The objective was to determine the utility of monitoring dermoscopic photographs of atypical nevi in a high-risk population. METHODS Over a 4.5-year period, digital dermoscopic photographs were taken of clinically atypical nevi at initial and follow-up visits, such that side-by-side comparisons could be made. RESUL...

BACKGROUND The similar genetic background of a pair of twins, and the similar environmental impacts to which they are exposed allow an exact and objective investigation of various constitutional and environmental factors in naevus development. As far as we are aware, this is the first published survey that simultaneously examines cutaneous and ocular pigmented lesions in an appreciable sample o...

Members of two different families were found to have the dysplastic naevus syndrome and coexistent endocrine abnormalities. The dysplastic naevus syndrome is probably inherited as an autosomal dominant trait and has been associated with other primary malignancies. This is the first time that it has been described in association with endocrine abnormalities.

Atypical moles, also called dysplastic nevi (DN), are considered by many to reside in the grey portion of the spectrum between benign nevi and melanoma. Because of the difficulty of assessing the behavior of an individual DN, and the association with an increased overall risk of melanoma, physicians and patients have grappled with the choice between observation and surgical excision.1 In the ab...

Whole cell extracts from human lymphoid cell lines can perform in vitro DNA repair synthesis in plasmids damaged by agents including UV or cis-diamminedichloroplatinum(II) (cis-DDP). Extracts from xeroderma pigmentosum (XP) cells are defective in repair synthesis. We have now studied in vitro DNA repair synthesis using extracts from lymphoblastoid cell lines representing four human hereditary s...