Is this a run-of-the-mill injury?
Sven is a 54-year-old accountant and recreational runner who, for the last six months, has been increasing the volume of runs ahead of a planned marathon event in three months.
Test your clinical know-how by taking the quiz below. If you select the wrong answer, have another go — you can try as many times as you like!
Dr Kate Kelso is a GP and medical editor of Australian Doctor.