Mets is a database of the patterns of metastatic spread of various cancers. You can search by the primary tumor or look by location and appearance of a metastasis.
We are currently up to 41 cancers and 139 types of metastases, for a total of 485 entries!
Other Resources:XRayPhysics - Radiology Physics Education | LinesTubes.com - Chest X-Ray Lines & Tubes | Normal Bones