I have just visited a orthopedic surgeon regarding cronic knee pain. After examination and viewing my x-ray, I was informed I have an 'unknown mass' behind my knee. I'm obviously stressed about it. I have to wait almost 3months before I can receive further tests. I'm hoping to be enlightened by defining his blood work requests. They are as follows: CBC Na/K/Cr/Bun (or Bon) Alk Po4 Ca/Po4 (or Poy) ESR. Thanx so much for your help