Unchanged Small Pulonary nodules

Hi, I think this is the best place to ask my question. I was diagnosed 8/1/07 with metasticized cancer in my liver of unknown origin. One of the possibilities is Lung (they are guessing lung, breast or upper GI) but nothing has been found even with a PET scan. I DO have several small black dots on my lungs. My last CT scan was just done last Tuesday, but I've not seen the report yet. My Oncologist said that there was no change. On 8/28 the report found "five small nonspecific, noncalcified pulmonary nodules: subpleural posterior left upper lobe; right upper lobe; right middle lobe and right lower lobe. the larges is 3x6mm nodule on the right lower lobe. All less than 5mm in greatest caliber but for the last one mentioned. Nonpspeci...