Micronodular thymic tumor with lymphoid stroma: A case report and review of the literature

Table 3 Characteristics of micronodular thymoma with lymphoid stroma and micronodular thymic carcinoma with lymphoid hyperplasia

	MNT group	MNC group	t or χ2	P
Age	63.4 ± 9.45	63.4 ± 9.45	1.954	0.054
Sex			0.31	0.860
Male	41	10
Female	36	8
Clinical symptoms			0.577	0.749
No	65	14
Local symptoms	8	3
Immune related symptoms	4	1
Masaoka stage			18.980	< 0.001
I	44	8		< 0.001
II	26	3
III	1	3
IV	0	2
Mitotic figures			41.214	< 0.001
≤ 2/10HPF	61	1
> 2/10HPF	6	11
Cell atypia			75.792	< 0.001
No	57	1
Mild	6	0
Moderate	6	1
Severe	0	16
Tumor size	43.34 ± 43.094	53.00 ± 73.04	0.539	0.591
Tumor necrosis			12.459	< 0.001
No	31	7
Yes	0	4
Follow-up results
No relapse or metastasis	51	9	9.582	0.002
Tumor relapse or tumor-caused death	0	2
CD5 staining in tumor cells			5.264	0.022
Negative	44	12
Positive	1	4
Ki67 staining in tumor cells			13.426	0.001
≤ 2%	15	0
2-10%	5	0
≥ 10%	4	5
TdT positive lymphocytes			14.933	000
No	4	8
Yes	16	0
Treatment			9.697	0.021
Resection	71	13
Resection + radiotherapy or chemotherapy	3	1
Radiotherapy + chemotherapy	0	1
No treatment	0	1

MNT: Micronodular thymoma with lymphoid stroma; MNC: Micronodular thymic carcinoma with lymphoid hyperplasia; HPF: High power fields.