 The clinical practice guidelines of the ESMO European Society of Medical Oncology published in 2010 found that there are no published data to indicate the optimal routine follow-up policy of surgically treated patients with localized disease. Moreover, it has not been demonstrated that, for limb sarcomas recurrences, MR Imaging is superior and cost-effective compared to US for the assessment of the primary site. Considering that surgically treated intermediate-high-grade patient may be followed frequently, even every 3-4 months in the first 2-3 years, if US is demonstrated to be non-inferior to MRI a great sparing of healthcare resources will be warranted. In addition, patients operated on for localized soft tissue sarcomas of the limb will be possibly followed-up with clinical examination and US instead of MR Imaging. 