Elsevier

Clinical Oncology

Volume 21, Issue 10, December 2009, Pages 775-780
Clinical Oncology

Original Article
Treatment of Aggressive Fibromatosis: the Experience of a Single Institution

https://doi.org/10.1016/j.clon.2009.08.012Get rights and content

Abstract

Aims

Aggressive fibromatosis is a locally aggressive infiltrative low-grade tumour, although pathologically benign, and it does not metastasise, yet it can cause serious local distressing symptoms by virtue of local destruction and impairment of local function. The aim of this study was to emphasise the role of radiotherapy and adequate surgery in the treatment of fibromatosis in patients presenting with newly diagnosed or recurrent disease and to analyse our treatment results over 15 years for this rare tumour type.

Materials and methods

Fifty-four patients with confirmed diagnosis of aggressive fibromatosis treated at King Faisal Specialist Hospital between 1990 and 2006 were identified from our local cancer registry. Forty-seven patients had surgery: complete resection (R0) in 20 patients, incomplete surgery (R1/2) in 27 patients, and seven patients had biopsy only. Forty-five patients were treated with radiotherapy: 38 patients were treated with postoperative radiotherapy, three patients were treated with preoperative radiotherapy and four patients had radiotherapy as the only treatment. The radiotherapy dose ranged between 45 and 60 Gy (median 50.4 Gy). Three patients did not receive any form of treatment apart from biopsy, but were still included in the final analysis.

Results

Fifty-two per cent (28/54 patients) of our patient population had tumour recurrence when first presented to King Faisal Specialist Hospital. The median age was 29.5 years (range 2–63 years). The most common site of involvement was the extremities (28 patients). Among the 54 patients (with primary and recurrent presentation) there were 10 local recurrences, all of which were within the original primary site. The 5-year progression-free survival and overall survival rates for the whole group were 75 and 95%, respectively. Univariate and multivariate Cox regression analysis showed that the depth of invasion significantly affected progression-free survival.

Conclusion

Aggressive fibromatosis is effectively treated with surgery and postoperative radiotherapy. Patients first presenting with tumour recurrence may still have local tumour control comparable with newly diagnosed patients.

Introduction

Aggressive fibromatosis is a locally aggressive infiltrative low-grade tumour. It virtually never metastasises, but can cause local destruction and organ dysfunction through infiltration of blood vessels and/or nerves. Radical surgery is paramount in local control, but because of the tumour's infiltrative nature, positive surgical margins and, hence, tumour recurrence are common findings 1, 2. Almost 100 years ago, James Ewing proposed treating inoperable tumours with radiation [3]. At that time, the precise role of radiotherapy was still not clearly defined [4]. Radiotherapy may be given as adjuvant treatment to decrease local recurrence, especially when the surgical margin is positive, or as a single treatment in cases where surgery will result in severe morbidity or disruption of organ function [5]. Nuyttens et al.[6], in a comparative review between surgery and radiotherapy, found that local control can approach 83% for primary radiotherapy.

The aim of the present study was to analyse our treatment results in this rare tumour type and to identify the important prognostic factors that could affect treatment outcome.

Section snippets

Materials and Methods

This was a retrospective analysis of patients with primary and recurrent aggressive fibromatosis treated at King Faisal Specialist Hospital (KFSH) between 1990 and 2006.

This study was approved by the research accreditation and ethical committee at KFSH in 2007.

Overall Outcome

For the whole group (taking all patients' primary and recurrent cases at presentation), with a median follow-up of 7.3 years, there were 10 (18.5%) local recurrences, all of which were within the original primary site or within the irradiated field. The actuarial local control rate at 5 years was 75% and at 10 years 67% (Fig. 1).

The univariate regression analysis of factors potentially affecting local control is shown in Table 2. In the univariate analysis, patients with completely resected

Discussion

Aggressive fibromatosis is a locally aggressive tumour, with a local recurrence rate that may reach as high as 70–90%, especially after incomplete resection 9, 10.

The treatment of fibromatosis usually consists of adequate surgery with a wide surgical margin (the definition of this margin is still contradictory), plus or minus postoperative radiotherapy 1, 11, 12. Chemotherapy, non-steroidal anti-inflammatory drugs or tamoxifen have been used, with limited published data 13, 14. In case surgery

Conclusion

Overall survival for aggressive fibromatosis is usually high and most deaths may not be related to the disease itself. Local control rates for primary vs recurrent disease were comparable in our data set. Radiotherapy and adequate surgery are very effective in radical treatment for aggressive fibromatosis, but still more data are needed to define when and who should be treated with radiotherapy.

Acknowledgment

We would like to thank Dr Abdelmoneim Eldaly from the Biostatistics Department for his help with the statistics for this study.

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