Columbia subject headings:
Cytodiagnosis.
Lungs--Cancer--Diagnosis.
Lungs--Needle biopsy.
Mediastinum--Needle biopsy.
Pleura--Needle biopsy.
Harvard subject headings:
Lungs--Cancer--Cytodiagnosis
Lungs--Needle biopsy.
Mediastinum--Needle biopsy.
Pleura--Needle biopsy.
Princeton subject headings: