‏3- Sampling or Biopsy: here, a narrow needle is directed, mainly through the skin, into various organs, such as the thyroid, liver, prostate, breast, bone, etc., using imaging devices. Then a specimen of tissue from the organ or its tumors is obtained.in order to be diagnosed. Nowadays, this method mainly is replaced open and surgical sampling and biopsies.

دکتر محمد نظری