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Image Number 746 (Keratoacanthoma)

 
Morphology:
Nodule,purple

Diagnosis: Keratoacanthoma

Site: Shoulder

Sex: M

Age: 82

Type: Clinical and Histology

Description: Rapid growth of this lesion

Submitted by: Ian McColl

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Differential Diagnosis

History: This lesion arose rapidly over a 4 week period when an elderly man was in respite care. The history suggested a keratoacanthoma but the morphology suggested an aggressive SCC. However when this was surgically excised and a large skin flap constructed, the histology was most in favour of keratoacanthoma. He had no local glands.

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