Abstract
Characteristic skin lesions in discoid lupus erythematosus are well-defined erythematous papules and plaques with partially adherent scales entering a patulous follicle. When scales are removed, their undersurface shows horny plugs that had previously occupied follicles. This clinical sign is described as the carpet tack sign, tin tack sign, or cat tongue sign (Fig 1). 1 Madke B. Nayak C. Eponymous signs in dermatology. Indian Dermatol Online J. 2012; 3: 159-165 Crossref PubMed Google Scholar It is also seen in seborrheic dermatitis 1 Madke B. Nayak C. Eponymous signs in dermatology. Indian Dermatol Online J. 2012; 3: 159-165 Crossref PubMed Google Scholar and pemphigus foliaceous. 2 Parasmsothy Y. Lawrence C.M. 'Tin-tack' sign in localized pemphigus foliaceus. Br J Dermatol. 1987; 116: 127-129 Google Scholar Clinical signs with many metaphors are difficult to explain to residents.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
