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Updated: Aug 12, 2025

Detection and Isolation of Circulating Melanoma Cells using Photoacoustic Flowmetry
Published on: November 25, 2011
Dermatoscopic finding of white circles in an invasive pigmented melanoma
Raghu Vasanthan1, Bengu Nisa Akay2, Simon P Clark3,4
1Cand MMed (Skin Cancer), School of Clinical Medicine University of Queensland, Brisbane, Queensland, Australia.
Abstract:
Dermatoscopic white circles, seen with both non-polarized and polarized dermatoscopy, are a known clue to actinic keratosis in a flat lesion and invasive squamous cell carcinoma in a raised lesion. We have not discovered a previous published example of this clue in a melanoma. We present a case report of a 70-year-old Australian male with a pigmented superficial spreading melanoma on the face, Breslow thickness 1 mm, with dermatoscopic white circles displayed with both polarized and non-polarized dermatoscopy, and with dermatopathological correlation.
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