People suspected of having pleural mesothelioma often have some type of intervention that involves inserting a needle into the pleura. This can happen in order to obtain a tissue sample for diagnosis or to place a catheter to drain off fluid that can accumulate around the lungs. Unfortunately, mesothelioma patients who have these types of interventions are also prone to developing tiny tumors along the path where the needle was inserted. These tumors are usually assumed to be metastatic mesothelioma that was “seeded” by the needle, and are typically treated with targeted radiation. But doctors at the University of Western Australia say clinicians should not be too quick to treat such tumors without confirming the diagnosis with a biopsy. Dr….