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Spontaneous Regression of Primary Abdominal Wall Desmoid Tumors: More Common than Previously Thought

  • Bone and Soft Tissue Sarcomas
  • Published:
Annals of Surgical Oncology Aims and scope Submit manuscript

Abstract

Purpose

The relevance of the initial observational approach for desmoid tumors (DTs) remains unclear. We investigated a new conservative management treatment for primary abdominal wall DTs.

Methods

Data were collected from 147 patients between 1993 and 2012. The initial therapeutic approaches were categorized as front-line surgery [surgery group (SG), n = 41, 28 %] and initial observation or medical treatment [nonsurgery group (NSG), n = 106, 72 %]. The cumulative incidence of the last strategy modification was estimated using competing risk methods with variable censoring times.

Results

Of the 147 patients, 143 were female (97 %). In the SG, 27 patients (66 %) required full-thickness abdominal wall mesh repair. In the NSG, 102 patients (96 %) underwent initial observation and four received medical treatment. In the NSG, the 1- and 3-year incidences of changing to medical treatment (no further changes during the follow-up) were 19 % [95 % confidence interval (CI) 11–28] and 25 % (95 % CI 17–35), respectively, and the 1- and 3-year incidences of a final switch to surgery were 14 % (95 % CI 8–22) and 16 % (95 % CI 9–24), respectively. An initial tumor size of >7 cm was associated with a higher strategy modification risk (p = 0.004). Of the 102 patients initially observed, 29 experienced spontaneous regression over a median follow-up period of 32 months. All second-intent resections were macroscopically completed, with R0 resections achieved in 82 % of patients.

Conclusions

This study supports an initial nonsurgical approach to abdominal wall DTs ≤7 cm, followed by surgery based on tumor growth in select cases.

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DISCLOSURE

The authors declare no conflict of interest.

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Correspondence to Sylvie Bonvalot MD, PhD or Alessandro Gronchi MD.

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Bonvalot, S., Ternès, N., Fiore, M. et al. Spontaneous Regression of Primary Abdominal Wall Desmoid Tumors: More Common than Previously Thought. Ann Surg Oncol 20, 4096–4102 (2013). https://doi.org/10.1245/s10434-013-3197-x

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  • DOI: https://doi.org/10.1245/s10434-013-3197-x

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