Introduction: Early diagnosis can improve melanoma prognosis. Dermoscopy can enhance early melanoma recognition.
Objectives: Examine the dermoscopy features of early melanoma up to a maximum surface diameter of 6 mm.
Methods: Consecutive melanoma cases were collected from two medical practices in Sydney, Australia 2019-2021. Dermoscopy features were recorded for melanomas by maximum surface diameter, to the nearest 0.1 mm, to a limit of 6 mm.
Results: Total cases numbered 100; with males (N = 48) and females (N = 52), melanoma in situ (MIS, N = 96) and invasive (N = 4). The most frequent anatomic sites on both males and females were back (males N = 20, females N = 16) then knee or leg (males N = 8, females N = 12). Minimum respective MIS diameters for males/females was 1.2/2.0 mm and for invasive cases 2.0/3.4 mm. Highest frequency dermoscopy features were: light brown, dark brown, gray and asymmetric melanoma shape. Brown pigment in hair follicles were more frequent on legs compared to other anatomic sites (odds ratio [OR] 14.6; 95% CI 1.29-165.17, P 0.03). Pseudopods were substantially increased in frequency comparing diameters less than 4 mm with 4 up to 6 mm (OR 8.81; 95% CI 1.05-73.9, P 0.004). Structureless area cases recorded increased gray (OR 7.08; 95% CI 1.61-31.11, P=0.01). Melanomas with edge angulation were noted in 20%-50% of cases across diameters 1-6 mm, less frequent were pigmented circles and polygons.
Conclusions: Watch out! MIS presented with a surface diameter of just 1.2 mm and invasive melanoma 2.5 mm. Pseudopods were a strong clue to melanomas with a surface diameter less than 5mm. We found melanomas on leg sites displayed more frequent pigmented hair follicles.
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http://dx.doi.org/10.5826/dpc.1204a197 | DOI Listing |
J Dtsch Dermatol Ges
December 2024
Department of Dermatology, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University, The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, Guangdong, China.
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Cureus
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View Article and Find Full Text PDFGeorgian Med News
October 2024
European University, Department of Dermatology, Tbilisi, Georgia.
Unlabelled: Nevi developed in children are one of the topical issues of pediatric dermatology. The constant change in size and shape often worries parents, and unnecessary removal of the nevi is planned. The development of accompanying scars and sometimes recurring nevi presents a new problem for parents and dermatologists.
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Department of Dermatology, Venereology and Leprology, Teerthanker Mahaveer Medical College and Research Centre, Moradabad, India.
Dermoscopy is a non-invasive tool which helps in the visualization of skin structures and patterns not visible to the naked eye. This study evaluates the effectiveness of dermoscopy in diagnosing primary syphilis, which typically presents as a painless ulcer at the site of inoculation. In this study, dermoscopic patterns such as vascular structures and background colour changes were analyzed in patients with confirmed primary syphilis.
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