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  • Title: Multiple cutaneous lymphoproliferative disorders showing a retained tumor clone by T-cell receptor gene rearrangement analysis: a case series of four patients and review of the literature.
    Author: Stowman AM, Hsia LL, Kanner WA, Mahadevan MS, Bullock GC, Patterson JW.
    Journal: Int J Dermatol; 2016 Feb; 55(2):e62-71. PubMed ID: 26266670.
    Abstract:
    BACKGROUND: Mycosis fungoides (MF) is the most common primary cutaneous T-cell lymphoma (CTCL), followed by CD30+ lymphoproliferative disorders, including lymphomatoid papulosis (LyP) and primary cutaneous anaplastic large cell lymphoma (pcALCL). The objective was to report on a series of patients with different types of CTCL at different times in their clinical course, with a focus on clonality studies. METHODS: Four patients with multiple diagnoses of CTCLs were identified. The clinical information, treatment interventions, and histopathology were reviewed. T-cell receptor (TCR) gene rearrangement studies were performed on all available specimens. RESULTS: The four patients carried diagnoses of: (1) pcALCL and MF; (2) pcALCL, LyP, and pcALCL; (3) LyP, MF, and pcALCL; (4) LyP, pcALCL, and MF; each with characteristic presentation and histopathologic findings. The results of the TCR polymerase chain reaction showed that all tumors expressed and retained a TCR clone(s) as follows: (1) biallelic clone; (2) single clone; (3) biallelic clone with additional clone; and (4) single clone, respectively. CONCLUSION: We report a series of four cases of individual patients with coexisting diagnoses of some combination of MF, LyP, and pcALCL, whose lesions presented in nontraditional sequence and demonstrated a retained clone by gene rearrangement analysis.
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