Brock model for a lung nodule

It is a clinical prediction tool, not a diagnosis. Its estimate must be interpreted alongside the scan itself, your health history and local clinical guidance.

The calculation combines details such as age, smoking history, family history of lung cancer, emphysema, nodule size, location, type, number and whether the edge is spiculated. A higher estimate signals a need for closer assessment; it does not confirm cancer.

The model may not fit every situation. Previous cancer, unusual scan findings or incomplete information can change how much weight a clinician gives the result.

Ask which measurements and history were entered and what management category the result supports. Possible plans include reviewing an older scan for stability, arranging another CT scan, obtaining more detailed imaging or discussing tissue sampling.

Keep copies of earlier chest images and attend follow-up at the recommended time. Comparing scans can show whether the nodule is unchanged or has altered in size or appearance.

Contact your healthcare team promptly if you develop coughing up blood, a new persistent cough, unexplained weight loss, worsening breathlessness or chest pain. Seek emergency help for severe breathing difficulty, heavy bleeding, fainting or bluish lips.

Do not wait for a planned nodule appointment when an acute symptom is severe or rapidly worsening.

Ask: Is the Brock model appropriate for my nodule? Which features influenced the estimate? Were older images compared? What is the recommended next test, and when should it happen? What symptoms should bring me back sooner?