A young adult patient has come into a dermatology clinic and reports having had a single 1-in lesion that was scaly with a raised border and a pink center on the chest. Now, a little more than a week later, there are smaller matching spots of the rash on both sides of the chest. The nurse observes pink, oval-shaped spots that are 1⁄4 to 1⁄2 in across. What condition does the nurse suspect the health care provider will diagnose?