Lung cancer w/mets to bone and now abdominal wall

My dad was diagnosed with lung cancer (fluid in lungs) w/mets to bone. We found out yesterday
his cancer has spread to his abdominal wall. Anybody ever hear of this? He was on carboplatin/avastin/alimta for chemo which was keeping his lesions on his bones from growing + his lymph nodes shrunk. Just worried and confused. Now they are going to switch his chemo to taxol? Any experience??