Good news! Stunning, in fact.
The biopsy came back, and it’s not cancer! They’re not sure exactly what happened, but he has some dead tissue on his spleen (kicked?), and if I understood it correctly (which I might not have, I was crying) the ‘lesions’ are the infection, and he’ll be okay after a long course of antibiotics and stall rest. He’s not out of the woods, but we can see the road! WHAHOOOOOOO