Terra firma-forme dermatosis
Alerts and Notices
Important News & Links
Synopsis
Terra firma-forme dermatosis (TFFD), sometimes referred to as Duncan's dirty dermatosis, is a condition characterized by asymptomatic, hyperpigmented, dirtlike plaques that are resistant to regular washing with soap and water but easily rub off with 70% isopropyl alcohol.
TFFD is the result of disordered and delayed keratinization of an unknown etiology. TFFD may appear anywhere on the body but is commonly found on the neck, axilla, and trunk. While it occurs more frequently in children and adolescents, it can be found in adults. There are currently no known predisposing risk factors (including age, race, sex, geography, medications, or comorbidities). Although not a life-threatening or contagious condition, it can lead to unnecessary tests (biopsies, endocrine evaluations, etc) and can be cosmetically bothersome for individuals unable to achieve clean-appearing skin.
TFFD is the result of disordered and delayed keratinization of an unknown etiology. TFFD may appear anywhere on the body but is commonly found on the neck, axilla, and trunk. While it occurs more frequently in children and adolescents, it can be found in adults. There are currently no known predisposing risk factors (including age, race, sex, geography, medications, or comorbidities). Although not a life-threatening or contagious condition, it can lead to unnecessary tests (biopsies, endocrine evaluations, etc) and can be cosmetically bothersome for individuals unable to achieve clean-appearing skin.
Codes
ICD10CM:
L85.9 – Epidermal thickening, unspecified
SNOMEDCT:
277905003 – Disorder of keratinization
L85.9 – Epidermal thickening, unspecified
SNOMEDCT:
277905003 – Disorder of keratinization
Look For
Subscription Required
Diagnostic Pearls
Subscription Required
Differential Diagnosis & Pitfalls
To perform a comparison, select diagnoses from the classic differential
Subscription Required
Best Tests
Subscription Required
Management Pearls
Subscription Required
Therapy
Subscription Required
References
Subscription Required
Last Updated:12/20/2018
Patient Information for Terra firma-forme dermatosis
Premium Feature
VisualDx Patient Handouts
Available in the Elite package
- Improve treatment compliance
- Reduce after-hours questions
- Increase patient engagement and satisfaction
- Written in clear, easy-to-understand language. No confusing jargon.
- Available in English and Spanish
- Print out or email directly to your patient
Upgrade Today