Solitary Pulmonary Nodule (SPN) Malignancy Risk Score (Mayo Clinic Model)
Predicts malignancy risk in solitary lung nodules on chest X-ray.
Do not use in patients with prior lung cancer diagnosis or with history of extrathoracic cancer diagnosed within 5 years of nodule presentation.
Advice
One study (Gould 2003) suggests watchful waiting only at very low post-test probabilities (<2%), biopsy at "lower" post-test probabilities (2% to 20%), and surgery at higher post-test probabilities (>70%).