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[Detection of HTLV-1 DNA in biopsies of Chilean patients with cutaneous T-cell lymphoma]
Background:
Human T-lymphotropic virus-1 (HTLV-1) infection has been associated with the pathogenesis of cutaneous T cell lymphomas (CTCL).
Aim:
To search for HTLV-1 DNA in skin biopsies of patients with CTCL.
Material And Methods:
A retrospective study was conducted using 25 biopsies of patients with CTCL. DNA was extracted from lymphoid tissue by microdissection. A nested PCR was conducted to detect HTLV-1 genome using primers for the tax region. As negative controls, four cases of superficial perivascular dermatitis were chosen. As positive controls, five cases of T-cell leukemia/lymphoma (ATCL) were studied.
Results:
A positive reaction was found in 3 of 25 cases. These biopsies corresponded to a case of Mycosis Fungoides, a case of CD30 (-) T-cell lymphoma and a case of lymphomatoid papulosis. Search was negative in the four cases of superficial perivascular dermatitis and positive in four cases of adult T-cell leukemia/lymphoma (ATCL).
Conclusions:
HTLV-1 DNA search in tissues is a useful tool recommended to study T-cell lymphomas. HTLV-1 infection only occurs in sporadic cases but may contribute to tumor aggressiveness and prognosis.
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