SONOGRAPHY OF THE PATELLAR LIGAMENT - AN EXPERIMENTAL-STUDY

Question: The accuracy of ultrasound in the detection of histological changes is a point of discussion. Method: In an experimental study we examined on 58 explanted human patellar tendons the correlation betwee n histological and sonographic changes. Results: Ultrasonographic meas urements of length, width, thickness and circumference of the ligament s correlated highly to the explants' macroscopic evaluated dimensions. The sonographic lesions were distinguished in changes in form and ech ogenicity. Macroscopic visible changes in the explanted ligaments coul d be detected ultrasonographically. In histological aspect 2 tendons a nd in ultrasonographical aspect 16 tendons were found to be normal in the whole course of the tendons. 14 ligaments showed histological but no ultrasonographical abnormalities. 42 ligaments were conspicious in both methods of examination. In the course of the tendons a very high correlation (up to 92%) between sonographical and histological finding s was detected. At the insertion area of the patellar ligament the cor relation was low. Conclusion: The performed study shows that ultrasono graphically detected lesions of the patellar ligament point to histolo gical changes but no conclusions to the kind of histological changes c an be taken. However ultrasonographically found abnormalities correlat e in a high proportion to histologically detectible changes in the lig aments. Ultrasonography is a good method to evaluate degenerative symp toms in the patellar ligament.