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Rhabdomyosarcoma Grouping System
Group I
Localized disease, completely resected
a. Confined to muscle or organ of origin
b. Infiltration outside the muscle or organ of origin
Group II
Gross total resection with
a. Microscopic residual disease
b. Regional lymphatic spread, resected
c. Both
Group III
Incomplete resection with gross residual disease
a. After biopsy only
b. After major resection (more than 50%)
Group IV Distant metastatic disease present at onset