HELP: meta-analysis on only two studies

Recently I am working to do a meta-analysis on some kind of gene-
disease. Since there are only two studies include in my work, it is
impossible to do a meta-regression. And the fixed effected model and
radom affected model are useless too. There are few studies focusing
on this topic, can any one give a sugguestion?
ps. I have not only the published data, but also the original data.
But they are so different, one meet the HWE perfectly, while the Chi-2
of another study is larger than 10.
.

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