Renal Cell or Transitional Cell is the Question

My husband had the additional CT scan and Cystoscopy that his Urologic Oncologist requested.  His bladder is good...everything is normal.  Even though they don't usually do biopsies on kidney tumors, he wants my husband to have one because he said it's very important that we know the cell type before we do surgery.  He needs to know if it's renal cell carcinoma or transitional cell carcinoma.  If it's renal cell, he can do a partial nephrectomy.  If it's transitional cell, the whole kidney would need to be removed, along with the ureter.  The thing is that he can't be positive by looking at the CT scan whether or not it's originating from the lining of the ureter (which would mean transitional cell).  He thinks it's just pressing on it, and not originating from it, but the only way to be sure is by doing a biopsy.  The tumor is 2.9 cm.  It's in the right upper pole.  It's contained in the kidney.  It hasn't spread to lymph nodes or anywhere else.  I'm more scared than ever right now because I had it in my head that he'd have a partial nephrectomy and we'd get through it.  This just became much more complicated.