Columbia subject headings:
Bladder--Diseases--Diagnosis.
Bladder--Needle biopsy.
Bladder--Tumors--Diagnosis.
Cytodiagnosis.
Harvard subject headings:
Bladder--Diseases--Cytodiagnosis.
Bladder--Needle biopsy.
Bladder--Tumors--Cytodiagnosis.
Princeton subject headings: