Check if element in XML exists that ends with matching string

I can see a way of searching for an element within XML by just going:

if(doc.SelectSingleNode("//mynode")==null)

But what I'm more interested in, is finding an element that matches the part of the name. Something like:

doc.SelectSingleNode ...that contains "table" in it. So if I had a node called "AlinasTable", I want it to find that. Why it matters is because my node can inconsistently contain anything that comes before "table", like "JohnsTable" - in which case I'd want that to be returned. So something more generic.

Cheers.