Table 2.

Detailed description of the 14 SPNs submitted to biopsy or follow-up CT.

Pre-test probability of malignancy according to the Herder model	SPNs for which results were available (n)	Results of a biopsy or follow-up CT
High	6	• 1 small-cell carcinoma • 5 adenocarcinomas of pulmonary origin
Intermediate	5	• 1 benign granuloma • 1 metastasis of a papillary thyroid carcinoma • 1 adenocarcinoma of pulmonary origin • 1 follow-up CT scan, acquired after 2 years, showing considerable nodule shrinkage • 1 follow-up CT scan showing nodule disappearance
Low	3	• 2 follow-up CT scans, acquired after 2 years, showing lesion stability • 1 follow-up CT scan showing disappearance of the nodule