Abstract: The patient was admitted with a chief complaint of chest distress and breathing obstruction for 5 yearsand epigastric distention and detection of a‘left lower lung mass’for more than 1 year. After admission, CTand MRI showed a giant intrathoracic mass accompanied by an intraspinal tumor. Fine needle aspiration biop-sy diagnosed the intrathoracic mass as solitary fibrous tumor. A two-incision surgery was performed to resectthe tumor. The tumor was confirmed as solitary fibrous tumor by postoperative pathology. Solitary fibrous tu-mors can occur in almost every part of the human body and are usually symptomless. Surgical treatment cancure most cases.