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Articles by C Longo
Total Records ( 3 ) for C Longo
  G Pellacani , M Vinceti , S Bassoli , R Braun , S Gonzalez , P Guitera , C Longo , A. A Marghoob , S. W Menzies , S Puig , A Scope , S Seidenari and J. Malvehy

Objective  To test the interobserver and intraobserver reproducibility of the standard terminology for description and diagnosis of melanocytic lesions in in vivo confocal microscopy.

Design  A dedicated Web platform was developed to train the participants and to allow independent distant evaluations of confocal images via the Internet.

Setting  Department of Dermatology, University of Modena and Reggio Emilia, Modena, Italy.

Participants  The study population was composed of 15 melanomas, 30 nevi, and 5 Spitz/Reed nevi. Six expert centers were invited to participate at the study.

Intervention  Evaluation of 36 features in 345 confocal microscopic images from melanocytic lesions.

Main Outcome Measure  Interobserved and intraobserved agreement, by calculating the Cohen statistics measure for each descriptor.

Results  High overall levels of reproducibility were shown for most of the evaluated features. In both the training and test sets there was a parallel trend of decreasing values as deeper anatomic skin levels were evaluated. All of the features, except 1, used for melanoma diagnosis, including roundish pagetoid cells, nonedged papillae, atypical cells in basal layer, cerebriform clusters, and nucleated cells infiltrating dermal papillae, showed high overall levels of reproducibility. However, less-than-ideal reproducibility was obtained for some descriptors, such as grainy appearance of the epidermis, junctional thickening, mild atypia in basal layer, plump bright cells, small bright cells, and reticulated fibers in the dermis.

Conclusion  The standard consensus confocal terminology useful for the evaluation of melanocytic lesions was reproducibly recognized by independent observers.

  S Borsari , C Longo , C Ferrari , E Benati , S Bassoli , S Schianchi , F Giusti , A. M Cesinaro , G Pellacani and S. Seidenari

Objectives  To determine the frequency and the features of the dermoscopic island (DI) in melanocytic lesions and to assess its specificity for the diagnosis of melanoma. Dermoscopy improves the diagnostic accuracy of melanoma, but only a few dermoscopic descriptors specific for thin melanomas have been identified. We defined a new descriptor, the dermoscopic island, a well-circumscribed area showing a uniform dermoscopic pattern that differs from the rest of the pigmented lesion.

Design  Dermoscopic images of 96 in situ melanomas, 266 invasive melanomas, and 612 dermoscopic atypical nevi were evaluated to establish the presence and the main pattern of the DI. Also, clinical and histologic characteristics were analyzed.

Setting  Dermoscopic images were collected from lesions excised between 2003 and 2008 at the Department of Dermatology, University of Modena and Reggio Emilia.

Main Outcome Measures  Specificity and odds ratio for melanoma; dermoscopic and histologic characteristics of lesions with a DI.

Results  The DI was present in 10.4% of in situ melanomas, 4.1% of invasive melanomas, and 3.1% of dermoscopic atypical nevi. The odds ratio for melanoma was 1.922, and specificity was 96.9%. Invasive melanomas with a DI were thinner than those lacking this descriptor. In addition, more than half of the melanomas with a DI arose on a nevus. The DI appeared mainly reticular on a reticular background.

Conclusion  The DI is characteristic of thin melanoma arising in a nevus; thus, it can be considered a potential early sign of transformation of a nevus into a melanoma.

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