title: Pityriasis Lichenoides-like Mycosis Fungoides: Clinical and Histologic Features and Response to Phototherapy.
abstract: BACKGROUND
  Pityriasis lichenoides (PL)-like skin lesions rarely appear as a specific manifestation of mycosis fungoides (MF).
  
  
  OBJECTIVE
  We investigated the clinicopathological features, immunophenotypes, and treatments of PL-like MF.
  
  
  METHODS
  This study included 15 patients with PL-like lesions selected from a population of 316 patients diagnosed with MF at one institution.
  
  
  RESULTS
  The patients were between 4 and 59 years of age. Four patients were older than 20 years of age. All of the patients had early-stage MF. In all patients, the atypical lymphocytic infiltrate had a perivascular distribution with epidermotropism. The CD4/CD8 ratio was <1 in 12 patients. Thirteen patients were treated with either narrowband ultraviolet B (NBUVB) or psoralen+ultraviolet A (PUVA), and all of them had complete responses.
  
  
  CONCLUSIONS
  PL-like MF appears to have a favorable prognosis and occurrence of this variant in adults is uncommon. MF should be suspected in the case of a PL-like skin eruption. Therefore, biopsy is required to confirm the diagnosis of PL-like MF, and NBUVB is a clinically effective treatment.
authors.affiliation: Department of Dermatology, Kosin University College of Medicine, Busan, Korea.
authors.forename: Min Soo
authors.initials: MS
authors.lastname: Jang
authors.affiliation: Department of Dermatology, Kosin University College of Medicine, Busan, Korea.
authors.forename: Dong Young
authors.initials: DY
authors.lastname: Kang
authors.affiliation: Department of Dermatology, Kosin University College of Medicine, Busan, Korea.
authors.forename: Jong Bin
authors.initials: JB
authors.lastname: Park
authors.affiliation: Department of Dermatology, Kosin University College of Medicine, Busan, Korea.
authors.forename: Joon Hee
authors.initials: JH
authors.lastname: Kim
authors.affiliation: Department of Dermatology, Kosin University College of Medicine, Busan, Korea.
authors.forename: Kwi Ae
authors.initials: KA
authors.lastname: Park
authors.affiliation: Department of Internal Medicine, Kosin University College of Medicine, Busan, Korea.
authors.forename: Hark
authors.initials: H
authors.lastname: Rim
authors.affiliation: Department of Dermatology, Kosin University College of Medicine, Busan, Korea.
authors.forename: Kee Suck
authors.initials: KS
authors.lastname: Suh
keywords: Mycosis fungoides; Phototherapy; Pityriasis lichenoides