Achilles tendon pain and related pathologies: diagnosis by ultrasonography.

BACKGROUND: When encountering complaints of pain in the area of the Achilles tendon, the clinician seldom reaches a correct and precise diagnosis based solely on the grounds of physical examination and standard X-rays.

OBJECTIVES: To assess the usefulness of ultrasound in diagnosing pathologies of the Achilles tendon.

METHODS: We conducted a retrospective review of patients presenting at our orthopedic clinics.

RESULTS: Sonography was used to evaluate 41 patients with achillodynia. This modality enabled the diagnoses of 19 abnormal tendons (46%), peritendinous and other lesions; a complete rupture in two patients (5%); a partial rupture of the Achilles tendon in 3 (7%); various degrees of calcification of the tendon in 7 (17%); and peritendinous lesions discerned by the tendon's hypoechoic regions with disorganized arrangement of collagen fibrils in 4 patients (10%). Other lesions included tendonitis (3 patients, 7%), retrocalcaneal bursitis (3 patients, 7%), lipoma (1 patient, 2%), and foreign bodies (2 patients, 5%). The mean diameter of the pathological tendons was 10.4 +/- 2.7 mm, while normal tendons measured 5.2 +/- 0.8 mm (P < 0.001).

CONCLUSION: As in many other soft tissue lesions, ultrasonography is a useful tool in the evaluation of the underlying pathology in patients presenting with achillodynia.