A malignant melanoma has invaded into a pre-existing seborrhoeic wart - a collision lesion (CSL-patient1)
Keywords: 70 years, Abdomen, Asymmetrical brown patch, Atypical pigment network, Dermoscopy, Histopathology-confirmed, Irregular blotches, Left flank, Male, Malignant melanoma, Melanoma in situ, Pink background, Seborrhoeic keratosis, Thick reticular lines, Varying shades
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