Abstract
The purpose of this study was to investigate the age-related morphologic changes of the lateral retropharyngeal lymph nodes using MR imaging. The maximal axial diameter of the nodes was measured on the MR image in 120 healthy subjects (younger group 6-19 years (n = 40), middle group 20-38 years (n = 48), older group 42-74 years (n = 32)). Between-group differences in the diameter of the nodes were analyzed. Mean values of the maximal axial diameter of the nodes were 9.0 +/- 1.6 mm, 6.6 +/- 1.7 mm, and 5.3 +/- 1.6 mm, corresponding to younger group, middle group, and older group, respectively ( P <.01). The information obtained in the current study is useful for the differential diagnosis of normal and abnormal lateral retropharyngeal lymph nodes according to age.
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