Spontaneous T-cell lymphoblastic lymphoma in a young ICR mouse: a case report.

Lymphoblastic lymphoma (LBL) is an aggressive neoplasm characterized by the proliferation of undifferentiated lymphocytes. It primarily spreads to immune organs such as the thymus, spleen, lymph nodes, bone marrow, and liver. Although well-documented in humans, spontaneous LBL cases in laboratory animals are exceedingly rare. This study reports a case of T cell-derived LBL in a young adult ICR mouse, notably without bone marrow metastasis. This case provides valuable insights into the spontaneous occurrence of LBL in laboratory rodents by contributing to comparative oncology and preclinical research.