A comparative study of two liquid-based preparation methods: membrane-based and sedimentation in fine needle aspiration cytology diagnosis in thyroid nodules

Table 1 Clinical characteristics of the 221 cases made by different preparation methods

Preparation methods/clinical characteristics	Nodule location			Maximum diameter		Ultrasound blood flow signal
	Left	Right	Isthmus	≥ 1 cm	< 1 cm	Ultrasound blood flow signal
	Left	Right	Isthmus	≥ 1 cm	< 1 cm	Yes	No
Membrane-based	77	69	7	39	114	70	83
Sedimentation	29	38	1	29	39	25	43

ISSN: 1477-7819