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Morphological evolution in melanoma in situ using revised pattern analysis
Author(s) -
Ramji Rajan,
Oakley Amanda,
Rademaker Marius
Publication year - 2021
Publication title -
pigment cell and melanoma research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.618
H-Index - 105
eISSN - 1755-148X
pISSN - 1755-1471
DOI - 10.1111/pcmr.12923
Subject(s) - in situ , melanoma , evolutionary biology , computational biology , biology , genetics , geography , meteorology
Sequential digital dermoscopic imaging (SDDI) compares surface microscopy images of skin lesions over multiple time points. We utilized a retrospective SDDI cohort to investigate the development of dermoscopic features associated with malignancy in melanoma in situ (MIS). A total of 124 in situ melanomas were assessed from 110 Caucasian patients aged ≥18 years, with ≥2 serial images obtained between 1999 and 2017 and followed for a mean 41 months (3–142). As a positive control group, 58 invasive melanomas from 53 patients were also reviewed. Change in MIS size or number of colours correlated to time (both p < .001). The odds of MIS displaying ≥3 clues to malignancy also correlated to time (OR 5.6–52.1) ( p < .05). 75% of in situ melanomas matched a dermoscopic subtype on final imaging. While a clinically significant minority of in situ melanomas were unchanged or lost dermoscopic features, lesions predominantly increased in morphological complexity over time. Longer follow‐up periods allow dermoscopic features associated with malignancy and histopathological progression to develop.