Long-Term Efficacy of Ultrasound-Guided Percutaneous Laser Ablation for Low-Risk Papillary Thyroid Microcarcinoma: A 5-Year Follow-Up Study

Table 2

Nodule diameter and volume before and after ultrasound-guided PLA treatment of PTMC as well as the volume reduction rate (VRR) at each follow-up timepoint.

Time	No. of nodules	Largest diameter (mm)	Mean volume (mm^3)	VRR (%)
Pretreatment	105	(4.5–9.8)	(20.28–416.56)	—	—
1 hour	105	(9.56–23.51)	(357.48–2087.38)	(-1386.62– -489.71)	<0.001
1 month	105	(6.97–17.44)	(165.34–1383.11)	(-399.73–-78.61)	<0.001
3 months	105	(2.92–12.71)	(68.28–653.19)	(-147.59–63.24)	<0.001
6 months	105	(0–8.95)	(0–273.37)	(17.42–100.00)	0.002
12 months	105	(0–4.28)	(0–76.36)	(59.41–100.00)	<0.001
18 months	105	(0–0.91)	(0–28.43)	(83.36–100.00)	<0.001
24 months	103	0	0	100	<0.001
36–60+ months	103	0	0	100	<0.001

values relative to pretreatment volume.