Columbia subject headings:
Head--Cytopathology.
Head--Needle biopsy.
Head--Tumors--Diagnosis.
Neck--Cytopathology.
Neck--Needle biopsy.
Neck--Tumors--Diagnosis.
Harvard subject headings:
Head--Cytopathology.
Head--Needle biopsy.
Head--Tumors--Diagnosis.
Neck--Cytopathology.
Neck--Needle biopsy.
Neck--Tumors--Diagnosis.
Princeton subject headings: