[Diagnostic imaging of Tietze's syndrome. Comparison of computerized tomography and ultrasonography].

Tietze's syndrome is an uncommon disease characterized by the absence of any systemic symptom; imaging techniques play a major role in the diagnosis of this condition. A control group including 10 normal subjects and 4 patients with clinical evidence of Tietze's syndrome were submitted to US; 3/4 patients underwent CT too. In the lesion site, US demonstrated thickened cartilage and inhomogeneously increased echogenicity in 4 patients, blurred outline in 3 patients and a hypoechoic halo in 1 patient. CT showed thickened cartilage and blurred outline in 3 patients and hypodense cartilage in 1 patient. Both methods were very useful to diagnose the disease in all cases. The authors conclude that US plays a major role in the diagnosis of Tietze's syndrome thanks to its harmlessness, repeatability and cost-effectiveness.