Table 1

Comparative features of disease in functionally distinct tendons

FeatureAchilles tendon diseaseShoulder tendon disease
Symptom durationAcute or chronicFrequently chronic
Type of diseaseTendinopathic or rupturedTendinopathic or torn
Typical time to clinical presentationDays to weeks (rupture), months to years (tendinopathic)Months to years
Inflammation changes with type of diseaseYesYes
Inflammation changes after treatment in asymptomatic patientsUnknownYes