I have MZL. In spleen also but last week’s MRI showed spleen was normal. Will see my oncologist at Memorial Sloan Kettering in a few days for 3 month check up. Received Rituxan once a week for 4 weeks last July when diagnosed, destroyed affected cells on 3rd infusion, in remission since. Symptoms are not fun but keeping positive. Wish you well, Michael. ☺️