Widespread Terra Firma-Forme Dermatosis: A Rare Presentation.

Terra firma-forme dermatosis (TFFD) is an idiopathic dermatological condition characterized by asymptomatic, dirt-like hyperpigmented brown plaques. The complete disappearance of hyperpigmented lesions upon the application of 70% ethyl alcohol, despite their persistence after routine cleaning with soap and water, serves as both a diagnostic and therapeutic method for the disease. Although only a limited number of case reports have been published in the literature so far, it is a relatively common condition encountered in routine outpatient examinations. Familiarity with this condition is important to prevent unnecessary patient anxiety and to avoid unnecessary laboratory tests and advanced investigations such as skin biopsy. This report presents a case of TFFD in a 44-year-old Turkish male patient who exhibited widespread asymptomatic brownish plaques on the neck, chest, abdomen, back, upper extremities, and thighs. This case is presented both to raise awareness of TFFD and to emphasize its widespread involvement, distinguishing it from previously reported cases.