Inclusion Criteria

DISEASE CHARACTERISTICS:

- Women who were eligible and evaluable for the GOG-0210 molecular staging protocol in
women with endometrial cancer

- Women who were registered during the unrestricted enrollment period (through
9/23/07) will automatically qualify

- Women who were registered during the restricted enrollment period (after
9/23/07) will only be considered if needed

- Women who had histologically confirmed endometrioid endometrial adenocarcinoma
regardless of stage or grade

- Women who have defective DNA mismatch repair and are microsatellite instability
positive (MSI+ and MSI-low)

- Women who consented to allow their specimens and clinical data to be used for future
cancer research

- Women who have sufficient high-quality genomic DNA from tumor available for mutation
analysis of ATR

PATIENT CHARACTERISTICS:

- Not specified

PRIOR CONCURRENT THERAPY:

- Not specified