J L Westcott1, N Rao, D P Colley. 1. Department of Radiology, Hospital of Saint Raphael, New Haven, CT 06511, USA.
Abstract
PURPOSE: To evaluate the diagnostic accuracy, complications, and usefulness of transthoracic needle biopsy of small pulmonary nodules. MATERIALS AND METHODS: Between January 1993 and January 1995, 302 patients underwent transthoracic needle biopsy of pulmonary lesions. Sixty-four lesions (in 62 patients) represented small nodules, defined as lesions of 15 mm or less maximum diameter. A total of 75 biopsies were performed in the 64 lesions. Approximately 90% of the biopsies were performed with computed tomographic guidance. RESULTS: There were 21 benign lesions and 43 cancers (36 primary, seven metastatic). Transthoracic needle biopsy findings were positive for cancer in 40 cases. In all three false-negative lesions, only one biopsy was performed. There were 21 true-negative results and no false-positive results. Positive and negative predictive values were 100% and 88%, respectively. Pneumothorax occurred in 20 (27%) of 75 biopsies, but chest tube placement was necessary in only three cases (4%). Surgery or thoracoscopy was avoided in 31 patients: 17 of 20 patients with benign disease, seven patients with metastatic disease, and seven patients with inoperable lung cancer. CONCLUSION: Transthoracic needle biopsy of small pulmonary nodules can produce diagnostic yields comparable with published results of transthoracic needle biopsy of larger lesions.
PURPOSE: To evaluate the diagnostic accuracy, complications, and usefulness of transthoracic needle biopsy of small pulmonary nodules. MATERIALS AND METHODS: Between January 1993 and January 1995, 302 patients underwent transthoracic needle biopsy of pulmonary lesions. Sixty-four lesions (in 62 patients) represented small nodules, defined as lesions of 15 mm or less maximum diameter. A total of 75 biopsies were performed in the 64 lesions. Approximately 90% of the biopsies were performed with computed tomographic guidance. RESULTS: There were 21 benign lesions and 43 cancers (36 primary, seven metastatic). Transthoracic needle biopsy findings were positive for cancer in 40 cases. In all three false-negative lesions, only one biopsy was performed. There were 21 true-negative results and no false-positive results. Positive and negative predictive values were 100% and 88%, respectively. Pneumothorax occurred in 20 (27%) of 75 biopsies, but chest tube placement was necessary in only three cases (4%). Surgery or thoracoscopy was avoided in 31 patients: 17 of 20 patients with benign disease, seven patients with metastatic disease, and seven patients with inoperable lung cancer. CONCLUSION: Transthoracic needle biopsy of small pulmonary nodules can produce diagnostic yields comparable with published results of transthoracic needle biopsy of larger lesions.
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