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  • Title: Disease characteristics, prognosis, and response to therapy in patients with large-cell transformed mycosis fungoides: A single-center retrospective study.
    Author: O'Donnell M, Zaya R, Correia E, Krishnasamy S, Sahu J, Shi W, Cha J, Alpdogan SO, Porcu P, Nikbakht N.
    Journal: J Am Acad Dermatol; 2022 Jun; 86(6):1285-1292. PubMed ID: 34273458.
    Abstract:
    BACKGROUND: Mycosis fungoides with large-cell transformation (MF-LCT) is associated with an aggressive clinical course, yet data comparing treatment outcomes in MF-LCT are sparse. OBJECTIVE: To compare treatment outcomes and to determine disease prevalence and characteristics associated with survival in MF-LCT. METHODS: A retrospective review was conducted of mycosis fungoides patients from 2012 to 2020 treated at Thomas Jefferson University. Patients with histopathologic diagnosis of MF-LCT were included. Treatment outcomes were assessed by mean changes in the modified Severity Weighted Assessment Tool (mSWAT) and stage. RESULTS: Of 171 patients with mycosis fungoides, 23 (13.4%) had histologic diagnosis of MF-LCT. The overall 5-year survival rate for MF-LCT was 74% and was not significantly associated with sex, age, or initial stage at the time of MF-LCT diagnosis. Brentuximab vedotin showed the greatest mean decrease in mSWAT (-20.53) and stage progression (change in Δ stage: -0.4) in MF-LCT compared to oral bexarotene (ΔmSWAT: +4.51; Δstage: +0.27), skin-directed therapy (ΔmSWAT: -5.93; Δstage: -0.08), and chemotherapy (ΔmSWAT: +4.97; Δstage: +0.85). LIMITATIONS: Single-center retrospective design, and patients often on multiple treatment modalities. CONCLUSIONS: We report superior treatment outcomes for brentuximab vedotin compared to oral bexarotene, skin-directed therapy, and chemotherapy in MF-LCT in both early and advanced disease.
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