TABLE 2.
Qualitative CT Features of Thymic Hyperplasia
| Feature | Total (n = 29) |
True Hyperplasia (n = 17) |
Lymphoid Hyperplasia (n = 12) |
P |
|---|---|---|---|---|
|
| ||||
| Morphologic feature | 0.45 | |||
| Pyramidal with convex margin | 20 | 10 | 10 | |
| Pyramidal with straight margin | 1 | 1 | 0 | |
| Pyramidal with concave margin | 3 | 3 | 0 | |
| Round or oval | 1 | 1 | 0 | |
| Irregular | 0 | 0 | 0 | |
| Indistinguishable from mediastinal fat | 4 | 2 | 2 | |
| Heterogeneity | 0.66 | |||
| Homogeneous | 7 | 5 | 2 | |
| Heterogeneous | 22 | 12 | 10 | |
| Fat content | 0.66 | |||
| Absent | 7 | 5 | 2 | |
| Present | 22 | 12 | 10 | |
| Calcification | 0.16 | |||
| Absent | 27 | 17 | 10 | |
| Present | 2 | 0 | 2 | |
| Nodular component | 0.25 | |||
| Absent | 26 | 14 | 12 | |
| Present | 3 | 3 | 0 | |
Note—Except where noted otherwise, data are number of thymus glands.