FIG 4. Case of a 66-year-old man with squamous cell carcinoma of the upper gingiva. This case shows the value of the presence of hilar echoes over that of increased short axis diameter. The presence of normal hilar flow as detected by Doppler sonography is helpful for confirming the presence of normal hilar echoes.

A, Gray-scale sonogram of a reactive cervical lymph. The short axis length is increased, suggestive of metastatic node; however, the normal hilar echo is present (arrows).

B, Power Doppler sonogram of the same reactive node as that shown in panel A shows a normal hilar flow (arrows).