Joseph Zenel, MD

The most appropriate choice is B. The history andphysical findings suggest that the patient may have afracture or contusion of the foot from trauma. There areno systemic signs that suggest an underlying infectious,chronic inflammatory, or oncologic process. A plain x-rayfilm of the foot is necessary to seewhether a fracture is present andwhether immobilization will be necessary.In the absence of fever and localerythema, infection appears unlikely,and a CBC count is unwarranted.