Have you assessed muscle length? ITB, Glut med, quads etc. It does sound suspiscious of a lateral meniscal injury, and in this instance, I think a more clear history would clarify a few things...how long ago was the injury (acute or chronic), what was the mechanism of the injury? What are the aggravating factors for his condition? If infact he has sustained a nasty acute meniscal injury causing some nociceptive pain mechanisms, then the principles of acute management would apply (PRICE), graduated exercise - mobility, increasing weight bearing, proprioceptive, Wikipedia reference-linkanti-inflammatory modalities might also be helpful in this instance. Radiographic investigations like Wikipedia reference-linkMRI will help to confirm the presence of a tear but would this make much difference in the management of the problem at this stage? I don't think your appropach in the acute stages would change irrespective of what the MRI finds. If in fact there are some postive muscle findings (tightness etc)...you may be able to address other biomechanical factors contributing to the problem.