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[Ultrasonography of the Osgood-Schlatter disease]
K Mahlfeld1, R Kayser, J Franke
1Orthopädische Universitätsklinik, Otto-von-Guericke-Universität Magdeburg. Konrad.Mahlfield@medizin.uni-magdeburg.de
Aim:
The aim of our study was to asses the value of ultrasound in the diagnosis of M. Osgood-Schlatter. The results of the primary ultrasound examination were compared with the use of X-ray.
Method:
15 patients were included in our study (average age 11 - 17 years, 8 female, 7male). All patients get an X-ray of the knee in two or three images. There was a reference-group of 10 patients with 20 joints (average age 11 - 14 years).
Results:
We observed typical sonographic images in different stages of M. Osgood-Schlatter. The changes depended on the duration of the disease. In every case we found a thickness of the patellar tendon of more than 1 mm (stage I and II), a bursitis infrapatellaris (stage II) and a fragmentation of the cortical bone of the apophysis (stage II). In cases of stage III disease a thickness of the patellar tendon of less than 1 mm was to be seen. In healthy people the average thickness of the patella tendon was 4.8 mm (3.5 - 5.7 mm). The maximal difference between the left and the right side was 0.4 mm.
Conclusions:
With the use ultrasound in cases of M. Osgood-Schlatter a reduced exposure of children to X-ray is possible. Ultrasound examination is a clear and easy way to diagnose the disease correctly and evaluate its course and cure.