الفهرس 
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Abstract
The diagnosis of bone and joint sepsis is difficult and often delayed as the clinical feature differ significantly from infection occurring in older children this is largely because of the absence of sign and symptoms secondary to immature immune system. In this study we examined the sensitivity and usefulness of different diagnostic modalities in the diagnosis of neonatal and early infantile septic hip. This study was also reported the results of treatment. This study included 40 neonates with 52 septic hips managed in Mansoura university hospital, 38 babies were admitted to the nursery, and the most common cause was septicemia. Sixteen were boys and the right hip was affected in 12babies and bilateral in 12. The clinical symptoms were failure to feed or to gain weight and irritability in 39 babies. The clinical symptoms were pseudoparalysis in all babies, abnormal position and pain on passive extension in 50 hips. The laboratory diagnosis reveled that the C reactive protein was positive in 97.5%, E.S.R in 92.5%, total leucocytic count in 42.5% and the blood culture in 35%. The imaging reveled that U.S was the most sensitive as it was positive in all hips. Operative drainage was done through anterior approach of the hip which was reveled pus in 69.3%, turbid synovial effusion in 26.9%and thick pus in 3.8%.the specimen culture was positive in 42.5% and the most common organism was staphylococcus aureus. The delay in treatment more than 5 days was associated with complication .