Case Age Lesion size (cm) Core needle biopsy diagnosis Follow-up procedure Resection Diagnosis 1 65 1.4 Negative for malignancy Lobectomy Squamous cell carcinoma 2 75 1.9 Negative for malignancy Wedge resection Adenocarcinoma 3 73 5.3 Atypical Lobectomy Inflammatory pseudotumor 4 80 1.0 Atypical Pneumectomy Adenocarcinoma 5 80 2.3 Atypical Wedge resection Adenosquamous carcinoma 6 63 1.1 Atypical Wedge resection Metastatic hepatocellular carcinoma 7 68 2.5 Atypical Lobectomy Adenocarcinoma

Table 2: Summary of false negative cases and cases that definite diagnosis cannot be made on core needle biopsy (only cases with follow-up resections included).