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Tsna or TSNA may refer to: Tsna (Moksha), a river in Tambov Oblast and Ryazan Oblast, tributary of the Moksha (Oka basin) Tsna (Tver Oblast), a river in Tver Oblast, Msta basin Tsna (Pripyat) a tributary of the Pripyat in Belarus Tsna (Oka), a river in Moscow Oblast, tributary of the Oka Tobacco-specific nitrosamines