35 yo man with rt foot pain. concerned his accessory navicular bone, type 2 is fx'ed after trauma. x-ray neg. utility of 3 phase bone scan?

Please clarify: I am not sure what you mean by "Type 2 is FX'ed after trauma". If you are referring to the patient having type 2 diabetes I would be very concerned over Charcot Foot. If that is the case this is mostly a clinical diagnosis with a temp diff in the feet being a strong predictor. Bone scan is usually nonspecific as is MRI although MRI w/contrast may be very helpful. If not the ? pleas clarify.

Similar treatment.: In the initial stages of the trauma, it would be better to attend to the things that matter first. Start with the RICE protocol. Rest, Ice, Compression and Elevation. Forget the bone scan and start the immobilization of the foot first. Depending on the severity, either non-weight bearing or crutch assist. I prefer a pneumatic cam walker. If improvement after a few weeks, all's fine. If not MR it.

Not much: Although bone scan may be a good choice for a lot of conditions, but it may not serve the purpose for this issue. A repeat X ray, an MRI or just immobilization may be better choices..