I also had a small Pnet diagnosed in March of this year, and had a distal pancreatectomy in July to remove it. I highly recommend resection as soon as possible because even though it was small, slow growing in the tail like yours, my Stanford surgeon discovered 2 tiny lesions on my liver that it had metastasized to (from Dotatate scan.)) This was zapped in an RF procedure the week before with microwave ablation. I was also lucky that my spleen was saved, and my surgery was laparoscopic. Hopefully I'll just require surveillance through scans. I'll see an oncologist in November. So, waiting is NOT recommended!