CSF1 and B-cell non-Hodgkin lymphoma: Our results demonstrating the presence of CSF-1 in the epithelia of the various organs of Rosa Vav1 transgenic mice that develop B-cell lymphoma, points to the possibility that it can be produced in cells other than hematopoietic system, once signaling driven by proteins such as Vav1 are abnormally expressed (Figure 6).