Extranodal follicular lymphoma in the lung of a free-ranging red deer (Cervus elaphus)
Chang Reissig, Elizabeth | Valli, Victor E. | Pesavento, Patricia | Massone, Adriana R. | Iovanitti, Beatriz | Gimeno, Eduardo J. | Uzal, Francisco A.
A hunted free-ranging female red deer (Cervus elaphus) from a region near the Nahuel Huapi National Park, Northern Patagonia, Argentina, had a focally extensive peribronchial lymphoid proliferative lesion in the lung characterized by formation of multiple follicles, with prominent germinal centers lacking mantle zone cells and antigen-related polarity. On examination of immunohistochemically stained tissues, a predominance of B cells (cluster of differentiation [CD]20 positive) with only a few scattered T cells (CD3 positive) were present. The histologic and immunohistochemical characteristics are consistent with follicular lymphoma, which is frequently seen in human beings and less frequently in domestic animals.
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