Background Foot deformity is one of the most common congenital musculoskeletal anomalies in the pediatric age group. Accurate diagnosis can be sometimes impossible to be established clinically. In the assessment of foot abnormalities, radiology plays a crucial role. Lack of ossification of the tarsal bones renders plain radiographs of the foot as of little diagnostic value in this age group. MRI apart from its cost requires anesthesia and sedation. In contrast, ultrasonography allows for the imaging of cartilaginous structures. As a result, newborn foot abnormalities can be thoroughly assessed. The whole anatomy of the foot is evaluated using several scanning views. Additional planes may be needed to show the pathologic features of a specific deformity. The purpose of this study was to demonstrate the additive value of ultrasound to plain radiographs in the assessment of foot deformities in the pediatric age group. Results This case–control study was performed on sixty children, 30 of which were patients admitted from the pediatric orthopedic clinic, presenting with foot deformity, after being examined clinically. Antero-posterior and lateral radiographs of foot, tibiocalcaneal, antero-posterior talocalcaneal, and lateral talocalcaneal angles were measured. Sonographic examination was done in different projections of both feet, while the patient is lying supine with dynamic sonography. The sonographic parameters measured were as follows: medial malleolar–navicular distance and medial soft tissue thickness on medial projection, calcaneocuboid distance on lateral projection, talonavicular relation on dorsal projection, and tibiocalcaneal distance on posterior projection. There was a statistically significant difference between patients and controls in the medial malleolar–navicular distance and medial soft tissue thickness measured on the medial view, the calcaneocuboid distance recorded on the lateral view, and the tibiocalcaneal distance measured on the posterior view. Conclusions Ultrasonography has a growing and useful role as a complementary imaging modality in the evaluation and follow-up of pediatric patients with foot deformity.
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