My husband, 58, stage 4 nsclc has a collapsed lower right lung. They have not found his tumor, but suspect it is inside the collapsed portion of his lung. They had a hard time diagnosing lung cancer, but were able to piece together some cells from the fluid that was trapped somewhere in the lung cavity. He has a chest tube in place which has to be drained every two days. I read this blog everyday, and it has been informative and supportive. Has anyone out there experienced the same " trapped lung?" Does the lung ever expand again? Will the chest tube be permanent?