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CD4 and CD8 T cells play critical roles in both innate and adaptive immune responses, managing and modulating cellular immunity during immune diseases and cancer. Their well-established functions have led to significant clinical benefits. CD4CD8 double-positive (DP) T cells, a subset of the T cell population, have been identified in the blood and peripheral lymphoid tissues across various species.

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Objectives: To describe the clinical presentation and clinicopathological findings of dogs with nodular splenic lesions composed of heterogeneous cell components associated with systemic inflammation and to provide information on the outcome after surgical resection.

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