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A Pilot Study Evaluating the Use of mTor Inhibitor Sirolimus in Children and Young Adults With Desmoid-Type Fibromatosis

Complete title: A Pilot Study Evaluating the use of the mTOR Inhibitor Sirolimus in Children and Young Adults with Desmoid-Type Fibromatosis

Research Study Number SC-6016
Principal Investigator Doug Hawkins, MD
Phase Pilot

Research Study Description

Desmoid-type fibromatosis (or desmoid tumor) represents an intermediate grade neoplasm with a striking predilection for locally invasive growth and recurrence following resection. It occurs in children as well as young adults. As a typically localized disease, the historical standard of care for treatment has been surgical resection, with or without ionizing radiation. In some cases where surgical resection or radiation is not feasible, chemotherapy has been used. Two clinical trials conducted in the Pediatric Oncology Group (POG) and the Children's Oncology Group (COG) evaluated the role for either low intensity or non-cytotoxic chemotherapy for children with desmoid tumor that is not amenable to standard therapy. These were largely empirical treatment strategies or based on somewhat anecdotal observations. By better understanding desmoid tumor biology, even more effective therapy targeting a particular protein that is central to the disease can be developed.

Desmoid tumor is well-known to be associated with deregulation of the Adenomatous Polyposis Cell/beta-catenin (APC/ß-catenin pathway). This is true of familial cases associated with Gardner's Syndrome and also in sporadic desmoid tumor, nearly all of which display histological or molecular evidence of Adenomatous Polyposis Cell/beta-catenin (APC ß-catenin) pathway activation (Alman et al., 1997; Lips et al., 2009). Several new pieces of evidence support the concept that deregulation of the mammalian target of rapamycin (mTOR) cell proliferation/survival pathway may play an important role in tumor biology when the APC/ß-catenin pathway is disrupted. Sirolimus, a drug that inhibits mammalian target of rapamycin (mTOR), is currently being evaluated as an anti-cancer agent in a variety of tumor types, but it has not been previously studied in desmoid tumor.

The investigators are conducting this pilot study to begin to explore whether mTOR inhibition may be beneficial for children and young adults with desmoid tumor.

Eligibility Criteria (must meet the following to participate in this study)

** For Eligibility information, please click on the "Look up trial at NIH" link above. **

Other eligibility criteria may apply.

Research Study Number SC-6016
Contact Alvin Russell Ongoco

Keywords: Pediatric Cancers, Miscellaneous; Solid Tumors; Neoplasms; Neoplasms, Connective and Soft Tissue; Fibroma; Fibromatosis, Aggressive; Desmoid Tumor; Neoplasms, Fibrous Tissue

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