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October 20, 2008

Dermoscopy of Solitary Yellow Lesions in Adults

Arch Dermatol. 2008;144(10):1412. doi:10.1001/archderm.144.10.1412

We describe the dermoscopic features of 3 clinically similar yellow lesions in adults. All 3 lesions showed a homogeneous pattern with various shades of yellow corresponding to dermal xanthomatous deposits, but they also presented some different facets that might improve the diagnostic performance of clinicians. The first lesion, which was a reticulohistiocytoma from the shoulder of a 36-year-old man, revealed some light-brown globules and dots, corresponding to hemosiderin deposits in the uppermost dermis (Figure 1). The second lesion, which was a xanthomatous dermatofibroma from the arm of a 39-year-old man, demonstrated the peripheral delicate pigment network that is usually seen in typical dermatofibromas, corresponding to hyperplastic epidermis with basal hyperpigmentation (Figure 2). Finally, the third lesion, which was an adult xanthogranuloma from the back of a 34-year-old man, showed only some isolated dotted vessels, histologically corresponding to rare dilated capillaries (Figure 3).

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