“…With the widespread utilization of mass survey and general health examination chest radiographs and CT scans, they have become increasingly easier to detect, and they enter into the differential diagnosis of coin lesions in the lung [Fujimoto et al, 1998;Takashima et al, 2003]. Despite recent progress in imaging technology, it is currently not possible to distinguish IPLNs radiologically from other benign or malignant pulmonary nodules [Bankoff et al, 1996;Fujimoto et al, 1998;Yokomise et al, 1998;Tsunezuka et al, 2000].…”