26.2 MB (1.4 MB compressed)
2446 x 3743 pixels
20.8 x 31.8 cm ⏐ 8.2 x 12.5 in (300dpi)
DR M.A. ANSARY / SCIENCE PHOTO LIBRARY DR M.A. ANSARY / SCIENCE PHOTO LIBRARY
Birthmark. Large pigmented birthmark (naevus) on a young boy's forehead. Naevi are a form of benign tumour composed almost entirely of enlarged blood vessels, which are congenital (present before birth). A moderately sized naevus is harmless but larger naevi (shown here) can be removed by surgery, burning with an electric needle, freezing with carbon dioxide or by laser treatment.
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