Table 3.

Factors of misdiagnosis

Features	Misdiagnosis		P
	No	Yes
Pain
No	12	3	0.010
Yes	7	13
Gender
Male	5	5	0.519
Female	14	11
Age
< 20 y	12	5	0.061
≥ 20 y	7	11
Tumor site
Perianal	13	13	0.319
Perineal	6	3
Tumor size
< 5 cm	8	4	0.285
≥ 5 cm	11	11
Pathological subtype
Alveolar	5	4	0.239
Embryonal	11	3
IRS clinical group
I	1	0	0.783
II	7	4
III	4	4
IV	4	1
Stage
2	5	1	0.391
3	8	7
4	4	1