title: Psoriasiform Sarcoidosis: Collision of Two Entities or Expression of One Common Pathogenesis?
abstract: BACKGROUND
  Psoriasiform lesions are an established, but rare, manifestation of sarcoidosis. Only 0.9 percent of patients with cutaneous sarcoidosis develop this form of the disease.
  
  
  METHODS
  The authors present a case of a 61-year-old woman with a history of pulmonary sarcoidosis who presented to their dermatology clinic with thick plaques resembling psoriasis. Biopsy of one of the lesions revealed sarcoidal granulomas in association with psoriasiform changes.
  
  
  CONCLUSIONS
  Psoriasiform lesions are a rare manifestation of sarcoidosis. The authors theorize that the co-expression of TNF-α in both entities is a possible explanation of the psoriasiform expression of sarcoidosis.
authors.affiliation: Thomas Jefferson University, Philadelphia, Pennsylvania;
authors.forename: Miriam L
authors.initials: ML
authors.lastname: Vega
authors.affiliation: University of Miami Department of Dermatology, Miami, Florida.
authors.forename: Jennifer
authors.initials: J
authors.lastname: Abrahams
authors.affiliation: Thomas Jefferson University, Philadelphia, Pennsylvania;
authors.forename: Matthew
authors.initials: M
authors.lastname: Keller