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Long-term results of therapy with sunitinib in metastatic alveolar soft part sarcoma

Abstract

Background

Alveolar soft part sarcoma (ASPS) is a rare, highly vascularized soft tissue sarcoma characterized by a high frequency of metastatic disease and resistance to classical chemotherapy. The purpose of our analysis was to assess long-term sunitinib activity in the treatment of metastatic ASPS.

Patients and methods

Between 2009 and 2015, 15 patients were diagnosed with metastatic ASPS and received therapy with sunitinib at initial continuous daily dosing of 37.5 mg. Median age was 32 years. The primary tumor sites were lower extremities (8), trunk-retroperitoneum/pelvis (2), upper extremity (3) and other (2). All patients had unresectable disease (primary or relapse in the form of metastases to the lungs ± bones). Five patients received systemic therapy before initiating sunitinib. Median follow-up from start of sunitinib was 38 months (range 5-69 months).

Results

At the time of analysis 4 patients continue therapy and 9 are still alive. Six patients had RECIST partial remission as best response, 8 had stable disease, and 1 had disease progression. The median progression-free survival was 19 months, with 86% of patients being free of progression at 6 months. Median overall survival was 56 months; the 5-year overall survival rate was 49%. Five patients were treated with sunitinib longer than 2 years. All patients experienced some side effects: 8 patients (53%) had CTCAE grade 3/4 toxicity, 7 patients required dose reduction. The most common toxicities were neutropenia, thrombocytopenia, hypothyroidism, arterial hypertension, and hand-foot syndrome.

Conclusions

Our analysis confirms the long-term efficacy of sunitinib in patients with advanced ASPS.

Tumori 2017; 103(3): 231 - 235

Article Type: ORIGINAL RESEARCH ARTICLE

DOI:10.5301/tj.5000617

Authors

Paulina Jagodzińska-Mucha, Tomasz Świtaj, Katarzyna Kozak, Hanna Koseła-Paterczyk, Anna Klimczak, Iwona Ługowska, Pawel Rogala, Michał Wągrodzki, Sławomir Falkowski, Piotr Rutkowski

Article History

Disclosures

Financial support: No external funding was received for this study.
Conflict of interest: Piotr Rutkowski has received honoraria for lectures from Pfizer.
Meeting presentation: The preliminary data of this study were presented during the Connective Tissue Oncology Society Meeting, November 9-12, 2016, Lisbon, Portugal.

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Authors

Affiliations

  • Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Warsaw - Poland
  • Department of Pathology, Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Warsaw - Poland
  • Paulina Jagodzińska-Mucha and Tomasz Świtaj contributed equally to this study.

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