How to visualize shared pathways between ORA (enrichment) results?

Question

[Picasa]

Hi,

I performed an over-representation analysis (ORA) separately for my differentially expressed genes, dividing them into upregulated and downregulated genes. Since I have two datasets, I generated 2 ORA results for upregulated genes and 2 ORA results for downregulated genes.

I noticed some common pathways between the two ORA results for the upregulated genes.

What are some good ways to summarize and visualize these results, especially to highlight the shared pathways but with keeping information about the 2 datasets (and in the future, more than 2 datasets) ?

Could you suggest example papers or R packages that might be helpful for creating these visualizations?

Thank you in advance!

[Dunois]

A Venn diagram or an Upset plot might work, I guess?

[Picasa]

I was thinking more about biological network :)