Thyroid fine-needle aspiration biopsy (FNA)-cytology is widely used for the preoperative characterisation of thyroid nodules but this task is difficult for follicular lesions, which often remain ...

Different types of catheters can be used to perform needle aspiration, and you should be familiar with the specific devices available at your institution. The procedure requires a 16-gauge or 18-gauge ...

Core needle biopsy (CNB) has emerged as a vital diagnostic tool in the evaluation of soft tissue tumours, offering a minimally invasive alternative to traditional open biopsies. Recent advances in ...

Q: How do they put that very small hole in a hypodermic needle? A: Actually they don’t. The needle is built around the hole. Although some needles are manufactured by other methods, the most common ...