[Real-time sonography in the diagnosis of neck cysts]

The diagnostic possibility of high resolution real time sonography has been investigated in 31 patients with cysts in the neck. The method is of special value preoperatively by demonstrating neighbouring structures, such as the parotid and thyroid glands and the major vessels in the neck; it contributes to differential diagnosis and surgical planning. Lateral cysts, because of their contents, may be highly echogenic and may be difficult to distinguish from lymphomas. The differential diagnosis of various cysts in the neck is discussed. An important aspect of sonography of the neck is the experience of the operator and his detailed knowledge of the local anatomy.