Outcome after surgical treatment of dermatofibrosarcoma protuberans: Is clinical follow‐up always indicated?
2019
BACKGROUND: Dermatofibrosarcoma protuberans (DFSP) is a rare soft tissue sarcoma for which clinical examination up to 10 years
is recommended. The objective of this study was to identify prognostic factors for recurrences and metastases that can be used to
evaluate the validity of follow-up schedules after treatment for DFSP.
METHODS: Patients with DFSP who received treatment
between 1991 and 2016 at 3 tertiary centers were included. Cox regression analyses were conducted to identify variables associated
with the primary endpoints.
RESULTS: In total 357 patients were included, with a median age of 38 years (age range, 2-87 years) and
a median follow-up of 60 months (interquartile range, 24-115 months). Eighty-one patients developed recurrent disease (22.7%), and
the median time to recurrence was 55.5 months (interquartile range, 20-90 months). Of these, 50 tumors (61.7%) were identified by
patient self-examination, whereas 3 recurrences (3.7%) were identified at clinical surveillance. For the remaining 28 tumors, no information was available on how the recurrences were identified (34.6%). Fibrosarcomatous change (hazard ratio, 21.865; P 5 cm (P = .014) were associated with the development of metastases.
CONCLUSIONS: Disease
recurrence after resection of DFSP remains a significant issue, whereas metastases are uncommon. The majority of recurrences are
identified by patient self-examination. Consideration should be given to individualized follow-up schedules based on risk factors for
recurrences and metastases.
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