Angle parameters proposed by Graf and linear parameters introduced by Morin are the most common currently in use for quantification and classification of ultrasonographic findings in the diagnosis of developmental dysplasia of the hip. The aim of this study was to determine which of the two parameters is more suited to routine clinical use. Investigation was carried out on 100 hips of 50 infants by the same examiner who obtained two separate sonograms for each hip. Based on the results of our study, angle parameters appear to be more functional in identifying and classifying pathology, and more adequate for screening and diagnosis.

Medial plica syndrome is usually a rare cause of anterior knee pain, but in adolescent athletes it is more common. A prospective investigation of clinical criteria for the diagnosis of medial plica syndrome was carried out. Investigating the stress test for the diagnosis of medial plica syndrome, we used active extension as a kick test and flexion to test blocking of swinging of the shank. The aim of this investigation was to examine these two new tests. The tests we used improved the accuracy of the clinical examination and allowed diagnosis of the symptomatic medial plica.

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The aim of this study was to select children with pathological lesions of the intra-articular structures from children with identical complaints but with no pathological intra-articular changes. The younger the child, the more difficult it is to make the diagnosis, and the expected distribution of pathology changes increasingly. This is particularly stressed in children aged younger than 13 years. Synovial inflammatory alterations are more frequent, and osteochondral and chondral fractures appear to be more problematic than meniscal and cruciate ligament lesions. Before establishing the indication for knee arthroscopy it is mandatory to implement the algorithm of diagnostic and conservative therapeutic procedures. The indication for knee arthroscopy is considered in cases when complaints persist after conservative treatment, a lesion of intra-articular segments is suspected, and the pathological condition is deemed arthroscopically treatable. Arthroscopy before conservative treatment is justified only in acute cases.