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Early onset endometrial cancer (Group 1): immunohistochemistry and MSI testing results (n=50)
| Total | MSI-H | MSI-L | MSS | Unknown | |
|---|---|---|---|---|---|
| Absent MLH1 | 6 (12%) | 5 | 1 | 0 | 0 |
| Absent MSH2 | 1 (2%) | 1 | 0 | 0 | 0 |
|
Total absent IHC |
7 (14%) | ||||
| Weak MLH1 | 9 (18%) | 1 | 2 | 5 | 1 |
| Weak MSH6 | 3 (6%) | 2 | 0 | 1 | 0 |
| Total weak IHC | 12 (24%) | ||||
| Normal IHC | 31 (62%) |
MSI = microsatellite instability; MSI-H = MSI-high; MSI-L = MSI-low; MSS = microsatellite stable; IHC = immunohistochemistry
