What is the recommended next step after detecting a lung nodule on a chest X-ray?

• A. Refer to surgery
• B. Conduct a follow-up chest X-ray
• C. Perform a CT of the chest and abdomen
• D. Start antibiotics immediately

Answer: (C)

After detecting a lung nodule on a chest X-ray, the recommended next step is to perform a CT of the chest and abdomen. This is important because a chest X-ray cannot provide the detailed information needed to characterize the nodule accurately, determine its size, shape, and density, or assess for any associated abnormalities.

A computed tomography (CT) scan enhances the visualization of the lung structures, allowing for better assessment of the nodule. It can help distinguish between benign and malignant nodules based on features such as calcification patterns and margins, and it can also evaluate for lymphadenopathy or other concerning findings in the surrounding lung tissue or mediastinum.

Other options, such as referring to surgery or starting antibiotics, do not address the need for thorough evaluation based on the imaging characteristics of the nodule. Additionally, simply conducting a follow-up chest X-ray may delay necessary intervention or treatment as it would not provide the comprehensive assessment required for clinical decision-making. Therefore, performing a CT scan is the most appropriate and clinically sound next step following the detection of a lung nodule.