Retrospective Study
Copyright ©The Author(s) 2021.
World J Clin Cases. Jul 16, 2021; 9(20): 5442-5452
Published online Jul 16, 2021. doi: 10.12998/wjcc.v9.i20.5442
Table 1 Clinical characteristics of 44 patients with dermatofibrosarcoma protuberans
Factor
Total
Primary group
Recurrent group
P value
Sex0.741
Male21912
Female231112
Onset age (mean ± SEM, yr)31.82 ± 1.6430.90 ± 2.3432.58 ± 2.240.616
Duration (mean ± SEM, mo)82.09 ± 12.1954.50 ± 15.40105.08 ± 16.630.037
Tumor diameter (mean ± SEM, cm)3.61 ± 0.462.25 ± 0.364.75 ± 0.700.004
Location0.540
Trunk261214
Other sites18108
Table 2 Detailed information of misdiagnosed patients with dermatofibrosarcoma protuberans
Characteristic
Total
No. of patients with recurrence
No. of patients without recurrence
Recurrence rate (%)
P value
With misdiagnosis history2517868.00
Without misdiagnosis history1971236.84
Total44242054.550.04
Table 3 Recurrence details
Characteristic
No. of patients with recurrence
No. of patients without recurrence
Percentage (%)
P value
Sex0.294
Male1216.67
Female3197.70
Onset age0.130
< 503387.89
≥ 50123.33
Age at diagnosis0.213
< 5 yr1234.17
≥ 5 yr31715.00
Tumor size0.252
< 3 cm1224.35
≥ 3 cm31814.29
Location0.773
Trunk2238.00
Other sites21710.52
Premier or recurrence0.028
Premier0230
Recurrence41719.05
No. treatment/
00190
10160
22340
≥ 320100
Table 4 Surgical characteristics of patients with dermatofibrosarcoma protuberans
Characteristic
No. of patients with recurrence
No. of patients without recurrence
P value
Resection margin0.841
< 3 cm217
≥ 3 cm221
Unknown02
Resection depth0.120
Above the fascia layer124
Below the muscular layer313
Unknown02
Table 5 Radiotherapy of patients with dermatofibrosarcoma protuberans

Radiotherapy group
Without radiotherapy group
P value
No. of patients without recurrence335
No. of patients with recurrence22
Recurrence rate (%)33.335.410.013