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  • Title: Cytological examination of the whole endobronchial brush in bronchoscopic diagnosis of lung cancer.
    Author: Gaber KA, Goldman JM, Farrell DJ.
    Journal: Respir Med; 2002 Apr; 96(4):259-61. PubMed ID: 12000005.
    Abstract:
    The combination of cytological and histological techniques has significantly increased the accuracy of fibreoptic bronchoscopy (FOB) in the diagnosis of lung cancer. We tested the hypothesis that cytological examination of material obtained from the whole endobronchial brush might increase the diagnostic yield in patients where conventional brush specimens were negative. Fifty patients who had undergone FOB for suspected lung cancer were studied prospectively. Bronchial lavage, bronchial biopsy and conventional brushing were performed. The whole endobronchial brush was then cut off the end of its wire and transported in a universal pot containing Shandon cytospin collection fluid. The material was dislodged from the whole brush using a vortex and the remaining fluid was centrifuged at 2,000 r.p.m. The fluid concentrate was used to maketwo cytopsin preparations. Papanicolaou stain was used. Fifty patients were studied, of which thirty-nine (78%) had endoscopicaly visible tumour. Of those, bronchial biopsy conventional brushing lavage and whole brush were positive for malignant cells in 31 (79.4%), 29 (74.3%), 21 (53.8%), and 16 (41%) of cases, respectively. A diagnosis of lung cancer was confirmed in 35 (89.7%) cases of endoscopicaly visible tumour. Conventional brushing was positive in two out of 11 (18.2%) cases with no visible tumour. Whole brush analysis was not positive in any of the cases with negative conventional brushings and was the least sensitive test in detecting malignancy Whole endobronchial brush analysis has no advantage in bronchoscopic diagnosis of patients with suspected lung cancer.
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