Effect of Hydroxyurea as Treatment for Primary Desmoid Tumors
The purpose of this study is to examine the response rate of desmoid tumors to hydroxyurea. The investigators hypothesize that hydroxyurea will be a safe, non-toxic alternative to aggressive surgery or chemotherapy for this difficult to treat tumor.
|Study Design:||Endpoint Classification: Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
|Official Title:||Effect of Hydroxyurea as Treatment for Primary Desmoid Tumors in Adults and Children|
- The primary outcome of this study is change in tumor size. [ Time Frame: 1 year ] [ Designated as safety issue: No ]
|Study Start Date:||October 2009|
|Estimated Study Completion Date:||January 2015|
|Estimated Primary Completion Date:||January 2015 (Final data collection date for primary outcome measure)|
Experimental: Desmoid tumor
Patients with desmoid tumors
Patients will take oral hydroxyurea with a starting dose of 20 mg/kg daily. Patients will remain on hydroxyurea as long as there is a response or stability in tumor size and associated toxicities are manageable. Maximum treatment duration will be one year.
The treatment of desmoid tumors is complicated by benign histology and potentially aggressive and recurrent behavior. Invasive or intensive treatments with surgery or radiation therapy can lead to good tumor control, but at the expense of significant side effects along with a high risk of local recurrence after surgical excision. Low dose regimens of standard chemotherapy drugs have been favored as a conservative first-line treatment; however, refractory and recurrent tumors are not uncommon. The purpose of this study is to investigate the efficacy and safety of using hydroxyurea, an anti-neoplastic agent with relatively few side-effects, as a novel treatment for primary, unresectable desmoid tumors, desmoid tumors that have had an incomplete primary resection, or desmoid tumors that have recurred after other therapy.
Patients presenting to our oncology center with a new diagnosis of desmoid tumor, or a recurrent desmoid tumor, will be eligible for this study. After informed consent, physical examination, and baseline imaging studies (CT/MRI), patients will receive oral hydroxyurea at a starting dose of 20 mg/kg daily. Laboratory tests will be performed at set intervals to maintain the appropriate dose and monitor for cytopenias. Clinical evaluations, physical examinations, and/or imaging studies will be conducted every three months to assess for changes in tumor size. Patients will remain on hydroxyurea as long as there is a response or stability in tumor size and associated toxicities are manageable. Data will be collected regarding the response to the drug, the duration of the response, and the occurrence of adverse events. The goal of the analysis will be to determine the efficacy of hydroxyurea as a treatment modality for desmoid tumors.