Hi,
I am not a doctor, but my interpretationof the biopsies would mean that in the A) the pathology shows that it is lowgrade, but that there were no fractions of muscle layer in the sample examined.
and in B)there were fragments of muscle, but no evidence of cancer.
I would request a second opinion, or at very least discuss this with your team, and if you are not satisfied with their explanations, seek another opinion, as the biopsy A should have fragments of muscle to show that the surgeon went deep enough to be sure there was no invasion.
I don·t believe the fact that they have rung you for weekly treatments means anything ominous, probaly just that they want to nip these low grade tumours in the bud, particularly as you said there were several.
Please let us know how he goes on and what your medical team say,
Diane