Case 1: A 46-year-old @entity1 with @entity1282 , @entity662 and cough admitted to our department. Radiological studies demonstrated a solid mass with a maximal diameter of 5cm at the posterior mediastinum. The @entity5 was resected, then postoperative radiotherapy (60Gy) and chemotherapy were performed. Results of histological and immunohistochemical study showed that the @entity5 consisted of @entity2615 . The @entity1 died of recurrence with bone @entity3 6 months after surgery. Case 2: A 76-year-old @entity1 with @entity1282 , @entity662 and cough admitted to our department Radiological studies demonstrated a solid mass with a maximal diameter of 12cm in the posterior mediastinum. accompanied by abundant effusion in the bilateral pleural cavities. The @entity1 underwent open biopsy and histological and immunohistochemical study showed that the @entity5 consisted of @entity2615 . The @entity1 died of @entity881 on the 1st postoperative day. We report extremely rare cases of @entity2615 that appeared to be posterior mediastinal @entity5 before surgery, and discuss the difficulty of diagnosing @entity2615 with atypical clinical manifestations.

[Sarcomatoid @entity2615 presenting as posterior mediastinal XXXX with @entity1282 ].

@entity1 :: ('9606', 'Species') :: ['patient', 'man'] @entity662 :: ('MESH:D002637', 'Disease') :: ['chest pain'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor'] @entity881 :: ('MESH:D009102', 'Disease') :: ['multiple organ failure'] @entity2615 :: ('MESH:D008654', 'Disease') :: ['sarcomatoid mesothelioma'] @entity1282 :: ('MESH:D003680', 'Disease') :: ['dysphagia'] @entity3 :: ('MESH:D009362', 'Disease') :: ['metastasis']
@entity5 :: (MESH:D009369,Disease) :: ['tumor']
