Abstract
In this case, a 66-year-old woman visited our hospital with the chief complaints of losses of appetite and weight, and underwent an abdominal contrast-enhanced computed tomography (CT) scan. A mass with a maximum diameter of 11 cm was detected in the right retroperitoneum. Subsequently, we suspected right adrenal carcinoma and resected the tumor. The histopathological diagnosis, based on the resected specimen, was undifferentiated pleomorphic sarcoma. However, it was difficult to identify the organ from which the sarcoma had originated. After surgery, no adjuvant therapy was administered. A CT scan performed 2 years and 10 months postoperatively revealed a tumor with a diameter of 18 mm in the right pulmonary apex region. A pulmonary metastasis was diagnosed following bronchoscopy and transbronchial biopsy. Because no other lesion was found, the patient underwent resection of the right upper lung lobe. The histopathological findings of this resected specimen were consistent with a metastasis of the earlier retroperitoneal tumor. Eight years, 2 months after resection of the primary lesion and 5 years, 2 months after resection of the pulmonary metastatic lesion, no sign of recurrence has been found during follow-up, despite the lack of adjuvant therapy.
