Should the Drs monitored me

I had a lymph node removed in 2009. My Dr said it was not cancer ( I had one swollen on both sides of my neck. My mother had lymphoma my dad had bone cancer. I was never told to follow up , I always thought that was not right. I started feeling a swollen node where the one was removed about 6 months ago. In June I had a routine mammogram, a spot that was there in 2008 had grown . With further testing I was diagnosed with NHL in July. Stage 2-3 . Both sides of my neck ,abdomen, right breast, both sides groin. Should they have followed up after lumpectomy ?

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