Transthoracic Needle Aspiration (TTNA)

A transthoracic needle aspiration (TTNA) is done to check if a growth in the lung is cancer. This abnormal growth, called a solitary pulmonary nodule (SPN), may be found during a chest X-ray or CT scan.

TTNA uses a long needle inserted through the chest wall between the ribs to take a tissue sample (biopsy). The needle usually is guided to the right spot in the lung with the help of a CT scan. A pathologist checks the sample under a microscope to see if it is cancer.

Current as of: May 12, 2017

Author: Healthwise Staff

Medical Review: Adam Husney, MD - Family Medicine & E. Gregory Thompson, MD - Internal Medicine & Kathleen Romito, MD - Family Medicine & Michael S. Rabin, MD - Medical Oncology