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    Pityriasis Lichenoides-like Mycosis Fungoides: Clinical and Histologic Features and Response to Phototherapy.
    Ann Dermatol 2016 Oct 30;28(5):540-547. Epub 2016 Sep 30.
    Department of Dermatology, Kosin University College of Medicine, Busan, Korea.
    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.

    Conclusion: 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.

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    Adult pityriasis lichenoides-like mycosis fungoides: a clinical variant of mycosis fungoides.
    Int J Dermatol 2014 Nov 25;53(11):1331-8. Epub 2014 Jun 25.
    Department of Dermatology, General Hospital of Valencia, Valencia, Spain.
    Background: Mycosis fungoides (MF) is the most frequent type of cutaneous T cell lymphoma. Its clinicopathological spectrum is wide, and the resulting diversity makes it difficult to establish a differential diagnosis among pityriasis lichenoides (PL), lymphomatoid papulosis (LyP), and atypical MF.

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    Clin Lymphoma Myeloma Leuk 2017 Sep 19;17(9):604-612. Epub 2017 Jun 19.
    Division of Dermatology, Department of Medicine, University of Toronto, Toronto, ON, Canada.
    Background: Phototherapy is used frequently to treat early-stage mycosis fungoides (MF). The effectiveness of bath psoralen-ultraviolet A (bath PUVA) and narrowband ultraviolet B (nbUVB) in MF is well established. However, evidence is limited comparing the effectiveness of the 2 modalities for early-stage MF. Read More
    [Papular mycosis fungoides].
    Ann Dermatol Venereol 2013 Jun-Jul;140(6-7):455-8. Epub 2013 May 22.
    Service de dermatologie, hôpital Nord, chemin de Bourrely, 13009 Marseille, France.
    Background: Mycosis fungoides (MF) is the most common type of cutaneous T-cell lymphoma. A new form of incipient MF has recently been described: papular MF. Herein, we report a case and propose a literature review. Read More
    Pityriasis lichenoides: a clonal T-cell lymphoproliferative disorder.
    Hum Pathol 2002 Aug;33(8):788-95
    Department of Pathology Ohio State University Medical Center, Columbus, OH 43210, USA.
    Pityriasis lichenoides (PL) is a papulosquamous disorder often considered a form of reactive dermatosis and classified with small plaque parapsoriasis (digitate dermatosis). However, some patients with PL have developed large plaque parapsoriasis (LPP) and mycosis fungoides (MF), and lymphoid atypia and T-cell clonality have been reported in lesions of PL. We set out to explore the possibility that PL is a form of T-cell dyscrasia. Read More