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Image Number 4854 (Dermatosis neglecta)


Diagnosis: Dermatosis neglecta

Site: Back

Sex: F

Age: 20


Description: asymp¬tomatic black or brown, dirt-like plaques.

Submitted by: Nameer Al-Sudany

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Differential Diagnosis


The patient gave history of avoiding cleaning her back due to hyperesthesia followed an operative fixation of thoracic and lumbar vertebrae. She developed asymptomatic, verrucous, brown-black, dirt-like plaques two months later on both sides of the midline scar of previous operation. Vigorous rubbing of the rash with 70% isopropyl alcohol pads has abolished that rash (70% isopropyl alcohol rubbing can be used as both diagnostic and therapeutic tool in dermatosis neglecta or terra firma-forme dermatosis). The only difference between dermatosis neglecta and terra firma-forme dermatosis is that there is no history of inadequate cleaning in the latter!

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