For diagnosis of a peroneal tendonitis it is necessary a history and a thorough clinical examination. During the peroneal tendonitis clinical examination will see the presence of tendon laxity in touch, the presence of voids, or the thickening or nodules of the peroneal tendon or of some heel bone spurs. Compared the two legs, to discover how the peroneal tendonitis affects the foot and joint mobility. The doctor will look for possible changes in the nerves or blood vessels in the area, such as for example the presence of hypoesthesia (reduced sensitivity).
To identify peroenal tendonitis the doctor will compress the legs: the leg will move when the legs are compressed, helping to identify a tendon rupture; a partial rupture of the tendon can be difficult to diagnose when the pain is minimal and there is a normal mobility; a compression of the calves in this case, can lead to a normal result, but it may feel a defect in the tendon. The doctor will observe the posture and walking: when the tendon is ruptured walking is difficult; the patient is likely to also can not keep his own weight on standing.
This investigation can provide additional data to confirm the diagnosis: the magnetic resonance imaging (MRI) used for evaluating peroneal tendonitis.