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Image Number 950 (Prurigo nodularis1)

Nodule,skin coloured

Diagnosis: Prurigo nodularis1

Site: Ankle

Sex: F

Age: 47

Type: Clinical

Description: Multiple skin-coloured excoriated papules and nodules

Submitted by: Nameer Al-Sudany

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Differential Diagnosis

History: Prurigo nodularis is a chronic dermatitis characterized by discrete, raised, firm hyperkeratotic papulonodules, usually from 5 to 12 mm in diameter but occasionally larger. They occur chiefly on the extensor surfaces of the extremities and are intensely pruritic. The disease usually begins in middle age and women are more frequently affected than men. The cause remains unknown but local trauma, insect bites, atopic background, and metabolic or systemic diseases have been implicated as predisposing factors in some cases.

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