<prompt> A 60 year old man is suspected of having endobronchial carcinoma: what should be the best investigationCT guided FNACbronchoscopy and biopsySputum cytologyX-ray chest  <response>: Fibreoptic bronchoscopy and biopsy is the investigation of choice in patients suspected endobronchogenic carcinoma,as endobronchial lesions are not reliably visualised on CT Ref Harrison 19th edition pg 246,247,512 