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Image Number 466 (Seborrhoeic keratosis)




 
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Diagnosis: Seborrhoeic keratosis

Morphologies: Kittler 1P clods >1colour
Sex: F

Age: 47

Type: Heine
Submitted by: Dr Ian McColl

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Description: Comedonal openings, crypts and bluish pigment in keratinocytes in this thick seborrhoeic keratosis.

History: The thicker dark seborrhoeic keratosis will often have a bluish tinge to it under the dermatoscope presumably because of the depth of melanin pigment in a thick lesion. All this pigment is in epidermal cells whereas we usually associate the colour blue with melanin pigment or nests deep in the dermis of melanocytic lesions.

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