A retrospective study will be performed including consecutive patients over a 3-year period from 2007 July to 2010 Dec. All patients were seen at our institution with malignant cervical lymphadenopathies. The biopsies were performed on an outpatient basis, unless the patient was hospitalized for alternative reasons. Equipment for sonographic studies consisted of a color Doppler US unit (Philips HDI 5000, Bothell, WA, US) and a 5-12 MHz broadband linear array transducer.