Needle biopsy techniques are increasingly being used ... a sliding inner hollow coaxial cutter, a so-called knockout shaft, a distal sampling notch, and a proximal tissue retrieval chamber ...

Endoscopic ultrasound-guided fine needle aspiration biopsy (EUS-FNA) is currently performed on a routine basis at many endoscopic centers and it is evident that this procedure has a major impact ...

Fine-needle aspiration biopsy of the thyroid nodule is a procedure in which a small sample of cells is obtained from a thyroid nodule with the aid of a thin needle under ultrasound guidance.