Lymphoma (lymphosarcoma) is a malignant cancer that is classified by location, cell type, and histological grade. The most common form in dogs is multicentric, involving the lymph nodes.

• 淋巴瘤是一种恶性肿瘤（癌），根据病灶部位、细胞类型和组织学分级来分型。犬类中最常见的情况是多病灶，并影响到淋巴结。