Fine Needle Sampling

Question 1

What is cytology

Answer 1

study of cell number and type in a tissue mass or fluid accumulation, it investigate its cause (usually inflammatory or neoplastic)

Question 2

Common types of cytological specimen (4)

Answer 2

Fine needle samples- capillary action sample or aspirate
Touch imprints- press glass slide against clean cut surface of lesion
Body Fluids
lavages

Question 3

what is fine needle capillary sampling

Answer 3

FNCS
No suction used
Recommended

Question 4

What is fine need aspiration

Answer 4

FNA
Minimal suction used
For cysts for failed FNCS

Question 5

what can diagnostic cytology show (5)

Answer 5

Differentiation of inflammation from tissue growth (hyperplasia/neoplasia)
Differentiation of types of inflammation
Detect neoplasia- benign vs malignant, should indicate general type, may identify specific
Differentiation of different fluids- exudates, transudates

Question 6

Advantages of cytology

Answer 6

Quick, safe, inexpensive

Question 7

Limitations of cytology

Answer 7

Can be false negatives- issue with sampling technique or extensive necrosis/inflammation present
Can be false positive- dysplasia (occurs in inflammatory diseases, the abnormal growth or development of a tissue or organ) can mimic neoplasia
gives bricks not buildings