Table 2 Data of 35 patients

Age

23 m–56 y (median, 23 y)

 < 10 y

4 (11%)

10–19 y

13 (38%)

 ≥ 20 y

18 (51%)

Gender

Male

10 (29%)

Female

25 (71%)

Symptoms

Perianal mass

34 (97%)

Pain

20 (57%)

Inguinal mass

2 (6%)

Bloody stool

2 (6%)

Difficult defecation

2 (6%)

Fecal incontinence

1 (3%)

Misdiagnosis history/time interval of diagnosis

35 (3 d–10 m, 3.1 m)

Misdiagnosis

16 (10 d–3 m, 2.6 m)

No misdiagnosis

19 (3 d–10 m, 3.4 m)

Pathological subtype

Alveolar

9

Embryonal

14

Pleomorphic

1

ND

11

IRS clinical group

I

1

II

11

III

8

IV

5

ND

10

Stage

2

6

3

15

4

5

ND

9

Tumor site

Perianal

26

Perineal

9

Tumor size

 < 5 cm

12

 ≥ 5 cm

22

ND

1

Regional lymph node metastasis

N0

7

N1

15

ND

13

Distant metastasis

M0

17

M1

5

ND

12

Surgical approach

LRR

12

APR

7

No surgery

or biopsy only

9

ND

7

Outcome

Survival time < 5 y

5

NED

3

AWD

2

Survival time ≥ 5 y

3

NED

2

AWD

1

DOD

14

ND

13