Terra firma-forme dermatosis: A report of ten individuals with Duncan's dirty dermatosis and literature review

Dermatology Practical & Conceptual
Tanya Greywal, Philip R Cohen

Abstract

Terra-firma forme dermatosis, also known as Duncan's dirty dermatosis, is a benign skin condition that presents as dirt-like plaques in patients of all ages. We describe a series of ten patients that presented with terra-firma forme dermatosis. We reviewed PubMed for the following terms: dermatosis, Duncan's dirty dermatosis, isopropyl alcohol, terra firma, and terra firma-forme dermatosis. We also reviewed papers containing these terms and their references. The diagnosis of terra firma-forme dermatosis was confirmed in all patients who had complete resolution of each lesion after the application of 70% isopropyl alcohol. Terra-firma forme dermatosis is easily diagnosed and treated with 70% isopropyl alcohol. It is important to recognize this benign dermatologic condition since it can be confused with other cutaneous disorders. Therefore, in order to avoid unnecessary referrals, biopsies, blood tests, and medications, we suggest a trial of wiping the skin lesion with 70% isopropyl alcohol pads when the diagnosis of terra-firma forme dermatosis is considered.

Citations

Jan 11, 2017·Journal of Paediatrics and Child Health
Sep 21, 2017·The American Journal of Dermatopathology·Gulsen Tukenmez DemirciEbru Demiralay
May 1, 2018·Journal of the European Academy of Dermatology and Venereology : JEADV·I NeriA Patrizi
Jul 19, 2017·International Journal of Dermatology·Enzo Errichetti, Giuseppe Stinco
Oct 23, 2016·Wiener medizinische Wochenschrift·Emine UnalGeorgi Tchernev
Dec 7, 2020·International Journal of Dermatology·Andrea SechiIria Neri
Jul 18, 2021·Clinics in Dermatology·Andrea SechiIria Neri
Sep 3, 2021·Pediatrics in Review·Renuka Rees, Shannan McCann

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