We do something like this: present the 'case' without giving away the Dx. Plot a differential. Reason through what labs you would want and what you would expect. After you run through this scenario, look at any lab values and the diagnosis. After you get the Dx, list any 'pearls' you can think of (dark red urine in McArdle's disease) and then correlate them with the UCV pearls.
The idea is just to be able to work your way through a case given the stem ("It burns when I pee"), some lab work, pertinent history, and a nugget or two. You may not learn a whole lot new, but it can really help your clinical reasoning.