[Surgical Resection of a Solitary Pulmonary Nodule in a Patient with Breast Cancer-A Case Report].

Solitary lung tumors after radical surgery for breast cancer often present difficulty in diagnosis and treatment. This report describes the case of a patient with a previous history of radicalsurgery for breast cancer who underwent lung surgery. Solitary pulmonary nodules should be diagnosed in patients with breast cancer, because treatments and prognoses differ between metastatic and primary tumors. At the age of 43 years, this patient underwent surgicaltreatment for breast cancer. Eighteen years later, a solitary mass was observed in the middle lobe of the right lung. Right middle lobectomy was performed using video-assisted thoracic surgery. The diagnosis was primary lung carcinoma. In case of primary lung carcinoma, radical treatment is possible through surgical resection. On the contrary, breast cancer metastasis has been known to have subtypes with characteristics that may often be different from those of the originall esions; therefore, surgicalresection helps in the reevaluation of receptor expression. Thus, early pathological diagnosis using surgical resection is useful for early diagnosis and treatment.

Extraskeletal osteosarcoma of the pleura:report of a case.

Extraskeletal osteosarcoma is a rare malignant tumor occurring very rarely in the pleura. We herein report the case of 67-year-old man with asbestos exposure, who underwent biopsies of the large tumor from the chest wall, and diagnosed as a suspicious of fibrosarcoma. Surgical resection was done, and the pathological diagnosis was extraskeletal osteosarcoma arising from the pleura. The differential diagnosis is malignant pleural mesothelioma with osseous and cartilaginous which is also very rare and one of the histopathological subtypes with heterologous elements. Identification of epithelial components, labeling for cytokeratins in spindle cells and its' anatomical distribution may help to distinguish them. In the neoplasm arising from the parietal pleura, primary extraskeletal osteosarcoma of the pleura is very rare, but should be considered.

Mucoepidermoid carcinoma of the thymus.

Mucoepidermoid carcinoma of the thymus is a rare carcinoma and there is little agreement about the treatment of this tumor. According to the analysis of previously reported tumors, biologic behavior of the tumor correlated with the spread of the lesion and degree of differentiation. We report a case of this tumor in a 31-year-old man. Resection of the tumor included the left upper lobe of the lung, the phrenic nerve, pericardium and disseminations in the pleura. The clinicopathological feature of this case was high-stage disease and low-grade histology. Postoperative chemotherapy and radiotherapy were performed, and the patient is alive without recurrence 14 months after surgery.