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* Sun exposure | * Sun exposure | ||
'''Theory''':[[File:BCC - refraction artefacts.png|thumb|Refraction artefacts| | '''Theory''':[[File:BCC - refraction artefacts.png|thumb|Refraction artefacts|337x337px]]Basal cell carcinomas can contain melanin. The tumor may therefore be mistaken for melanoma. | ||
The blue ink on the bottom is probably used to mark the surgical margin. | The blue ink on the bottom is probably used to mark the surgical margin. |