PMC8254521_01
Case presentation 1. (A) clinical presentation, (B) clinical presentation, detailed view of the suspected lesion, (C) dermoscopic picture of seborrheic keratosis, (D) dermoscopic picture of the pigmented BCC.
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During the clinical examination, numerous SK and solar lentigines were found on his trunk, as well as papules and excoriations (Figure 1A). In the area of the left scapula, a suspicious lesion of unknown duration was found - a nodule with an inflamed infiltrated margin, with ulceration, covered with horny and bloody masses (Figure 1B). The dermoscopic examination also confirmed the diagnosis of seborrheic keratosis with characteristic fingerprint-like structures, the presence of comedo-like openings and milia-like cysts (Figure 1C). The dermoscopic picture was blurred by the powder the patient had used on the ulceration (Figure 1D).
PMC8254521_02
Case presentation 2. (A) clinical presentation, (B) dermoscopic picture of solar lentigo, (C) dermoscopic picture of seborrheic keratosis, (D) dermoscopic picture of the lentigo malignant melanoma.
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In the upper part of the patch, irregular hyperpigmentation was noted (Figure 2A). In dermoscopy, the light brown structureless areas and fingerprint-like areas were found (Figure 2B). We also noticed the features of seborrheic keratosis in the papules (Figure 2C). In some parts of the lesion, we also noticed the pigment of a greyish hue and thus the patient was referred for a biopsy excision of a skin fragment of the upper part of this hyperpigmented patch (Figure 2D).