MySQL: possible to combine CASE forms?

I know that there are two different CASE forms available, one for checking equality and one for checking expression results. Is it possible to combine the two? If not, any other suggestions? I'm imagining something like this:

SELECT
    CASE
        WHEN foo LIKE '%bar' THEN 'foobar'
        WHEN foo = 'gob' THEN 'jobe'
    END AS x;

...or...

SELECT
    CASE foo
        WHEN LIKE '%bar' THEN 'foobar'
        WHEN 'gob' THEN 'jobe'
    END AS x;

But I get syntax errors for both.