Accuracy Between Transthoracal Needle Aspiration (TTNA) Techniques in Suspected Lung Cancer Patients

This study compares two different methods of taking tissue samples (biopsies) from a lung tumor — a fine needle aspiration (drawing cells with a thin needle) versus a core needle biopsy (taking a small tissue cylinder) — to see which one gives more accurate results in diagnosing suspected lung cancer. **You may be eligible if...** - You are 18 to 75 years old - You have a suspicious lung mass that needs to be sampled by ultrasound-guided needle biopsy - Your tumor is located near the chest wall (peripheral location) **You may NOT be eligible if...** - You refuse the biopsy procedure - Your tumor is deep inside the lung and not accessible from the chest wall - You have bleeding problems or other conditions that make biopsy unsafe Talk to your doctor to see if this trial is right for you.