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Ann Thorac Surg 1991;51:378-386
© 1991 The Society of Thoracic Surgeons

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Articles

Primary cysts and tumors of the mediastinum

^a Department of Thoracic Surgery, Walter Reed Army Medical Center, Washington, DC USA
^b Department of Surgery, Uniformed Services University of the Health Sciences, Bethesda, Maryland USA

^_* Address reprint requests to Dr Edwards, Cardiothoracic Surgery, Walter Reed Army Medical Center, Washington, DC 20307-5001.

A retrospective analysis was performed on 230 patients with primary cysts and tumors of the mediastinum seen at our institution from January 1944 to April 1989. We divided these patients into two groups. Group 1 was seen before 1970 and group 2 was seen from January 1970 to April 1989. There was a significant increase in the prevalence of malignancy in group 2 (47.2% versus 17.1%; p < 0.0001) due to an increase in the number of lymphomas (22.6% versus 3.5%; p < 0.001) and malignant neurogenic tumors (6.8% versus 1.1%; p = 0.0528). There was a significant increase in the number of malignant tumors in the anterior (59.5% versus 30.9%; p = 0.0022) and paravertebral (28.5% versus 2.8%; p = 0.0027) compartments in group 2. More patients with these tumors were symptomatic in group 2 (63.6% versus 5%; p = 0.0422). There was an increase of ancillary diagnostic studies performed to evaluate these tumors (76.0% versus 34.5%; p = 0.0422). Logistic regression analysis identified date of presentation (p < 0.005), symptoms (p < 0.01), size (p < 0.005), and the anterior mediastinal compartment (p < 0.005) as preoperative predictors of malignancy. The surgical approach to these tumors included more median sternotomy (30.1% versus 10.7%; p = 0.0008), anterior mediastinotomy, and cervical mediastinoscopy in group 2 (1.1% versus 17.5%; p = 0.0002). Long-term results support surgical resection in benign lesions and an aggressive multimodality approach to malignant lesions.

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