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15 October 1997 | Volume 127 Issue 8 (Part 1) | Pages 604-612
Background: Current methods for detecting mediastinal lymph node involvement with non-small-cell lung cancer can be inaccurate and are often invasive and expensive.
Objective: To assess the utility of endoscopic ultrasonography, fine-needle aspiration biopsy guided by endoscopic ultrasonography, and computed tomography for the detection of metastases to the posterior mediastinal lymph nodes in non-small-cell lung cancer.
Design: Prospective preoperative evaluation of the diagnostic operating characteristics of these procedures.
Setting: Referral-based academic medical center.
Patients: 130 consecutive patients with non-small-cell lung cancer who were otherwise good surgical candidates.
Interventions: All patients had initial computed tomography of the chest; those with enlarged nodes were referred for endoscopic ultrasonography. Endoscopic ultrasonography-guided fine-needle aspiration biopsy was done on suspicious contralateral posterior mediastinal or subcarinal lymph nodes identified by ultrasonography. At surgery, lymph nodes were dissected and categorized by location and underwent histopathologic evaluation.
Results: 52 patients were ultimately enrolled in the study: Thirty-one had thoracotomy with mediastinal dissection, and 21 had tumors considered unresectable on the basis of preoperative evaluation. Ultrasonography without aspiration biopsy had an overall accuracy of 84% for predicting metastasis to lymph nodes; computed tomography had an accuracy of 49% (P < 0.025). Twenty-four patients had ultrasonography-guided aspiration biopsy; 14 of the 24 were ineligible for surgery because cytology showed malignancy. Results of surgical pathology correlated with negative aspiration cytology results in 9 of 10 patients; the one node with false-negative results contained a 2-mm focus of cancer. The accuracy of ultrasonography-guided aspiration biopsy in diagnosing metastasis to lymph nodes was 96%; the results of this test prompted a change in management in 95% of the patients who had the procedure.
Conclusions: Endoscopic ultrasonography alone or with fine-needle aspiration biopsy adds useful diagnostic information in determining metastasis to posterior mediastinal or subcarinal lymph nodes in patients with non-small-cell lung cancer. These procedures are especially helpful in the preoperative evaluation of patients with suspicious contralateral mediastinal or "bulky" subcarinal nodes.
Author and Article Information
From Indiana University School of Medicine, Indianapolis, Indiana.
ARTICLE
Endoscopic Ultrasonography, Fine-Needle Aspiration Biopsy Guided by Endoscopic Ultrasonography, and Computed Tomography in the Preoperative Staging of Non-Small-Cell Lung Cancer: A Comparison Study
Acknowledgments: The authors thank Marilyn Datzman, MD, and Syed Zaidi, MD, for technical support and recruitment of patients; Chris Lambert, Nancy Ruiz, and Stephen Melson for editorial and typing assistance; and Mark Hanna, MS, and Rene Gonin, PhD, for statistical advice.
Grant Support: In part by a research grant from the American College of Gastroenterology.
Requests for Reprints: Frank G. Gress, MD, Division of Gastroenterology and Hepatology, Winthrop-University Hospital, State University of New York at Stony Brook, School of Medicine and Health Science Center, 222 Station Plaza North, Suite 429, Long Island, NY 11501.
Current Author Addresses: Dr. Gress: Division of Gastroenterology and Hepatology, Winthrop-University Hospital, State University of New York at Stony Brook, School of Medicine and Health Science Center, 222 Station Plaza North, Suite 429, Long Island, NY 11501.
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