Results of treatment of patients with superficial facial rhabdomyosarcomas on protocols of the Intergroup Rhabdomyosarcoma Study Group (IRSG), 1984-1997.

ABSTRACT

PURPOSE: We analyzed the outcome of 47 patients with superficial facial rhabdomyosarcoma (RMS) treated on Intergroup Rhabdomyosarcoma Study Group (IRSG) Protocols-III, -IV-Pilot, and -IV. METHODS: We reviewed patients' records. Clinico-pathologic features, treatment, and outcome were examined to identify prognostic factors. RESULTS: Thirty-two patients were males; 35 patients were 1-9 years old at diagnosis. Tumor sites were buccal/cheek (N = 21), external nasal/nasolabial (N = 12), lip/chin (N = 9), and masseter (N = 5). Patients (46/47) had localized disease 18 biopsy only (Group III), 17 microscopic residual tumor (Group II), and 11 complete resection without residual tumor (Group I). Eight-year estimated event-free survival (EFS) and overall survival (OAS) rates were 61% and 65%. Patients <12 months old had inferior EFS, 21%, compared to approximately 68% in older patients (P = 0.077). Eight-year EFS rates were 80% for females and 50% for males (P = 0.096). Eight-year EFS rates were 72% in 33 patients without regional lymph-nodal tumor and 39% in 14 patients with regional nodal tumor (P = 0.07). Eight-year EFS rates were 72% for 22 patients with embryonal RMS and 53% for 23 patients with alveolar RMS (P = 0.28). Location of the primary tumor was not significantly related to outcome. CONCLUSIONS: Patients with superficial facial RMS often have localized, grossly resectable lesions at the time of presentation. Favorable prognostic factors include age >12 months, female gender, embryonal histology, and no lymph-nodal tumor.