P061 : The 2018 revised WHO-EORTC classification of cutaneous lymphoma in Korea: Single tertiary institution

Background: Cutaneous lymphomas have different features with other lymphomas. The classification of cutaneous lymphoma has constantly been revised based on tumor cell biology and diagnostic techniques and WHO-EORTC published an updated classification in 2018. Objectives: We investigated the relative frequency and survival profiles of cutaneous lymphomas in Korea according to the revised 2018 WHO-EORTC classification. Methods: The medical records of patients diagnosed with cutaneous lymphoma were retrospectively reviewed. The demographic data and relative frequency were compared with the former study(2012) in the same institution and Western study. Results: Total 256 patients were enrolled in the analysis, 183 patients were classified to primary cutaneous lymphoma. The median age of onset was 49 and the sex ratio was 1:1.37(F:M). The 5-year survival rate of cutaneous lymphoma was 77.73%, primary cutaneous lymphoma was 84.15%, and secondary cutaneous lymphoma was 61.64%. The frequency was 85.25% for T/NK-cell lymphoma and 14.75% for B-cell lymphoma. Conclusion: The proportion of cutaneous T cell lymphoma, subcutaneous panniculitis-like T-cell lymphoma, extranodal NK/T-cell lymphoma nasal type, chronic EBV infection was higher than Western data. This result was the same as the former study, but the proportion was decreased.