Table 1.

Estimated Recurrence Rate of Various Cancers.

Cancer	Recurrence Rate
Breast	30% distant recurrence (9, 10)
Glioblastoma	~100% (11)
Prostate	20-30% (12)
Leukemia, childhood AML	9-29% (6)
NSCLC	30-50% locoregional or distant recurrence (13, 14)
Osteosarcoma	30-40% (15, 16)
Ovarian	85% (17)
Pancreatic	36% within 1 year of curative surgery 38% local recurrence & 46% distant metastasis after adjuvant chemotherapy (18, 19).
Melanoma	50% of all patients treated for melanoma will have a recurrence. Of these recurrences, ~50% will be in the regional lymph nodes, 20% will be local recurrences, and 30% will arise at distant sites (20)