Ultrasonographic features and recurrence risk of transient synovitis of the hip in children: a retrospective study

Among children with unilateral or bilateral TSH, the ACD in both hips increased with age. Higher ACD and ACD ratio were risk factors for recurrence. As ACD increased with age in children with TSH, using the ACD ratio can reduce the effect of age on ACD when assessing the risk for recurrence of TSH. These results provide valuable information for understanding the demographic and hip ultrasound characteristics of TSH, and reveal the association between ACD and age in children with TSH, which aids in the assessment of TSH prognosis. Further studies are needed to better understand the clinical relevance of recurrent factors in TSH.