Microblotches on Dermoscopy of Melanocytic Lesions are Associated with Melanoma: A Cross-sectional Study

Acta Dermato-Venereologica

Vania Lukoviek¹  Sebastian Podlipnik²  Cristina Carrera²  Josep Malvehy²  Francesca Perino²  Marion Chavez-Bourgeois²  Nuria Ferrera²  Mauricio Ortiz-Ruiz²  Susana Puig²  Alicia Barreiro²  Sümeyre Seda Ertekin² 

[1] Department of Dermatology, Melanoma Unit, Hospital Clínic of Barcelona, Barcelona, Spain. ;;

关键词: dermoscopy;    dermatoscopy;    melanoma;    microblotches;    prognosis;   

DOI  :  10.2340/00015555-3436

来源: DOAJ

【 摘 要 】

Numerous dermoscopic structures for the early detection of melanoma have been described. The aim of this study was to illustrate the characteristics of dermoscopic structures that are similar to blotches, but smaller (termed microblotches), and to evaluate their association with other well-known dermoscopic structures. A cross-sectional study design, including 165 dermoscopic images of melanoma was used to define microblotches, and 241 consecutive images of naevi from the HAM10000 database, were studied to evaluate the prevalence of this criterion in both groups. Microblotches were defined as sharply demarcated structures ≤1 mm, with geographical borders visible only with dermoscopy. Microblotches were present in 38.7% of the melanomas and 6.7% of the naevi. Moreover, microblotches were associated with an odds ratio (OR) of malignancy of 5.79, and were more frequent in invasive melanoma than in the in-situ subtype (OR 2.92). Histologically, they correspond to hyperpigmented parakeratosis or epidermal consumption. In conclusion, microblotches are related to melanomas. This finding could help dermatologists to differentiate between naevi and melanomas.

【 授权许可】

Unknown