The book "Role of Ultrasonography in the Diagnosis of Head and Neck Swellings" provides a comprehensive analysis of the role of ultrasound in diagnosing swellings in the head and neck region. It highlights the advantages of this non-invasive method, which is characterized by its availability, cost-effectiveness, and painlessness. Ultrasound allows for a detailed representation of fine structures and is capable of determining both the presence and exact location of diseases. The book emphasizes that the use of real-time ultrasound with high-frequency transducers significantly improves the assessment of soft tissue masses and enables differentiation between cystic and solid lesions, as well as between malignant and benign or inflammatory masses. Additionally, it discusses the usefulness of ultrasound in differentiating cellulitis from abscesses and in diagnosing salivary gland diseases.