title: The needle in the haystack.
mesh_terms: D001999:Bronchoscopy; D002283:Carcinoma, Bronchogenic / Q000175:diagnosis* / Q000473:pathology; D005336:Fiber Optic Technology; D005453:Fluorescence; D006415:Hematoporphyrins; D006801:Humans; D008175:Lung Neoplasms / Q000175:diagnosis* / Q000473:pathology
chemical_list: D006415:Hematoporphyrins