Retrospective evaluation of the incidental finding of 403 papillary thyroid microcarcinomas in 2466 patients undergoing thyroid surgery for presumed benign thyroid disease

Table 1 Incidence of PTMC ^a in relation to sex, age, BTD ^b and extent of surgery

	All cases		Cases with PTMC		Cases without PTMC		Pearson chi-square
	N	%	N	%	N	%	Value	p
Sex
Males	338	13.7	58	17.2	280	82.8	.191	.692
Females	2128	86.3	345	16.2	1783	83.8	.191	.692
Age
<20	29	1.2	4	13.8	25	86.2	3.920	.687
21-30	173	7.0	20	11.6	153	88.4
31-40	353	14.3	56	15.9	297	84.1
41-50	489	19.8	84	17.2	405	82.8
51-60	684	27.7	119	17.4	565	82.6
61-70	545	22.1	88	16.2	457	83.8
70+	193	7.8	32	16.6	161	83.4
BTD
MNG^c	1143	46.4	188	16.4	955	83.6	.017	.913
Hashimoto	317	12.9	72	22.7	245	77.3	10.799	.001
Graves	457	18.5	65	14.2	392	85.8	1.842	.183
Plummer's	278	11.3	38	13.7	240	86.3	1.638	.228
SHTN^d	136	5.5	9	6.6	127	93.4	9.956	.001
Benign tumour	875	35.5	142	16.2	733	83.8	.013	.955
Extent of surgery
HT group^e	762	30.9	102	13.4	660	86.6	7.050	.008
TT group^f	1704	69.1	301	17.7	1403	82.3	7.050	.008
Total	2466	100	403	16.3	2063	83.7	N/A

^aPapillary thyroid microcarcinoma; ^bBenign thyroid disease; ^cMNG Multinodular goitre; ^dSHTN Solitary hyperfunctional thyroid nodule; ^eLess than total or near-total thyroidectomy; ^fTotal or near-total thyroidectomy.

ISSN: 1471-2407