Purpose
To evaluate the outcome of children with rhabdomyosarcoma (RMS) of the hand or foot treated with surgery and/or local radiotherapy (RT).
Methods
Forty-eight patients with non-metastatic RMS of the hand or foot were enrolled on Intergroup Rhabdomyosarcoma Study Group III, IV-Pilot, and IV. Patients received multi-agent chemotherapy with surgery and/or RT. Twenty-four patients (50%) underwent surgery without local RT, of whom 4 had complete resection and 20 had an amputation. The remaining 24 patients (50%) underwent local RT, of whom 2 required RT for microscopic residual disease following prior amputation. Median follow-up for surviving patients is 9.7 years.
Results
Actuarial 10-year local control is 100%; 10-year event-free (EFS) and overall survival (OS) are 62% and 63%, respectively. Poor prognostic factors for recurrence include gross residual (Group III) disease and nodal involvement (p=0.01 and 0.05, respectively). More patients in the RT group had alveolar histology, Group III disease, and nodal involvement, as compared to the surgery group. There is no difference in 10-year EFS (57% vs. 66%) or OS (63% vs. 63%) between patients who underwent surgery or local RT. Among relapsing patients, there are no long-term survivors. No secondary malignancies have been observed.
Conclusions
Despite having high-risk features, patients treated with local RT achieved excellent local control. Complete surgical resection without amputation is difficult to achieve in the hand or foot. Therefore, we recommend either definitive RT or surgical resection which maintains form and function as primary local therapy rather than amputation in patients with hand or foot rhabdomyosarcoma.