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[Schloffer Tumor that Appeared and Increased 40 Months after Resection of Lung Cancer and was Suspected of Recurrence of Pleural Dissemination].

The case is a 50-year-old woman. Video-assisted thoracic surgery (VATS) left upper division segmentectomy was performed for adenocarcinoma through a postero-lateral incision. The pathological result was stage ⅠA. A chest computed tomography (CT) examination 40 months after the operation revealed a nodule in contact with the left 6th rib. A recurrence due to pleural dissemination was suspected in the PET/CT examination, but the possibility of reactive granulation was also considered. Two months later, chest CT reexamination showed an enlargement of the nodule, and reoperation was performed. A fibrous structure that appears to be a silk thread for closing chest at the 1st operation was found on the chest wall. The pathological examination revealed chronic suppurative pleuritis and organizing pneumonia without malignancy, leading to a diagnosis of Schloffer tumor.