Fig. 1
From: Risk factors for distant metastasis of dermatofibrosarcoma protuberans
a Frequency of local recurrence before visiting our institute. Looking at the frequency of local recurrence and metastasis before visiting our hospital, out of five cases with metastasis, three (60 %) had not recurred and two had recurred twice. In addition, out of 62 cases without metastasis, 52 had not recurred, 8 had recurred once, 1 had recurred twice, and 1 had recurred three times or more. b Size of primary tumor. Looking at the 60 cases of O-DFSP, tumor size was less than 5 cm in 46 (77 %) cases, 5 cm to less than 10 cm in 13 (22 %) cases, and 10 cm or larger in 1 (1 %) case. Looking at the seven cases of FS-DFSP, tumor size was 5 cm to less than 10 cm in three (43 %) cases, and 10 cm or larger in four (57 %) cases. c Size of primary tumor. Looking at the 62 nonmetastatic cases, tumor size was less than 5 cm in 46 (74 %) cases, 5 cm to less than 10 cm in 15 (24 %) cases, and 10 cm or larger in 1 (2 %) case. Looking at the five metastatic cases, tumor size was 5 cm to less than 10 cm in 1 (20 %) case and 10 cm or larger in 4 (80 %) cases