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  • Title: Cutaneous squamous cell carcinoma metastatic to chronic lymphocytic leukaemia: diagnostic potential of fine needle aspiration cytology.
    Author: Flezar MS, Prevodnik VK, Kirbis IS, Strojan P.
    Journal: Cytopathology; 2006 Oct; 17(5):288-94. PubMed ID: 16961658.
    Abstract:
    OBJECTIVE: The phenomenon of cancer-to-cancer metastasis of cutaneous squamous cell carcinoma (SCC) and chronic lymphocytic leukaemia (CLL)/small lymphocytic lymphoma (SLL) is a rare event and only occasionally documented in the medical literature. METHODS: Two patients with SCC of the skin that were previously treated for CLL are presented. Both had palpable lymph nodes in the neck and fine needle aspiration cytology (FNAC) was performed to evaluate the pathological process. In addition, the literature on cutaneous SCC metastatic to CLL/SLL with special emphasis on the role of FNAC in this specific clinical situation was reviewed. RESULTS: On examination of the FNAC smear, cancer-to-cancer metastasis of cutaneous SCC to lymph node replaced by CLL was found. In one of the patients, light microscopy examination of the smear was complemented by immunostaining of atypical cells with cytokeratin antibodies and immunophenotyping of lymphoid cells by flow cytometry. In addition to our two patients, nine cases of cutaneous SCC metastatic to CLL/SLL have been reported in the literature, and in only one was the diagnosis made by FNAC. CONCLUSION: FNAC supported by ancillary immunocytological techniques could also be used in diagnosis of specific clinical situations such as cancer-to-cancer metastasis of the tandem of SCC-CLL/SLL.
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