Abstract
Background: Terra Firma-Forme Dermatosis (TFFD), a benign skin condition which presents with asymptomatic brown to black plaques which resemble dirty skin. Aim: To document a new case presentation with TFFD in the Arab region which is considered as one of the differential diagnoses of dirty neck. Case presentation: A 15-year-old girl presented with a history of asymptomatic brownish dirt-like lesion on the nape and sides of the neck for 4-years duration, not resolved by wash with water and soap and confused with other dermatoses like acanthosis nigricans or atopic dermatitis. The diagnosis of TFFD was confirmed when the lesions were completely resolved after gentle swabbing with 70% isopropyl alcohol. Conclusion: TFFD is rarely reported in Arab region and should be considered when evaluating cases of dirty neck-like presentation of atopic dermatitis or acanthosis nigricans.
Highlights
Terra Firma-Forme Dermatosis (TFFD), a benign skin condition which presents with asymptomatic brown to black plaques which resemble dirty skin
Case presentation: A 15-year-old girl presented with a history of asymptomatic brownish dirt-like lesion on the nape and sides of the neck for 4-years duration, not resolved by wash with water and soap and confused with other dermatoses like acanthosis nigricans or atopic dermatitis
TFFD is rarely reported in Arab region and should be considered when evaluating cases of dirty neck-like presentation of atopic dermatitis or acanthosis nigricans
Summary
TFFD is a benign condition which presents with asymptomatic brown to black plaques and resembles dirty skin [1] [2] [3]. It was first reported by Duncan et al in 1987 and received the nickname “Duncan’s dirty disease” [2]. In the present case report, we are describing a girl presented with chronic dirt-like Brownish, Hyperkeratotic Plaques on the nape and sides of neck which are not resolved by washing with water and soap but completely resolved by rubbing of skin with a 70% isopropyl alcohol, confirming the diagnosis of TFFD. The consent form taken from parents is about the publication of her condition
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