Table 1.
Criteria by which to distinguish second primary tumours vs metastasis (adapted from Detterbeck t al10)
| Relative criteria that favour synchronous tumours |
|---|
| Different radiography appearance (i.e. shape, density) |
| Different metabolic activity |
| Different growth rates (if previous imaging is available) |
| Absence of nodal or systemic metastasis |
| Relative criteria that favour metastasis |
| Same radiographic appearance |
| Similar growth rates (if previous imaging is available) |
| Significant nodal or systemic metastases |