Importantly, the promoting effect of AI on lymphoma growth was seen in both a murine T cell lymphoma (EG7) and a human B cell lymphoma (Granta-519) suggesting that aromatase inhibition promotes lymphoma growth of both human and murine lymphomas as well as both T and B cell lymphomas, thus proposing a more general effect on lymphomas. This evidence concerns the gene CYP19A1 and B-cell non-Hodgkin lymphoma.