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Image Number 560 (Seborrhoeic keratosis)


Diagnosis: Seborrhoeic keratosis

Site: Scalp

Sex: M

Age: 75

Type: Clinical

Description: Seborrheic keratoses of varying sizes and pigmentation

Submitted by: Shahbaz Janjua

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Differential Diagnosis

History: Seborrheic keratoses have a varying degree of pigmentation but the fully developed lesions are often deeply pigmented and do not reflect light. The proliferating keratinocytes trigger the activation of neighboring melanocytes by secreting melanocyte-stimulating cytokines.

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