From Cavitation of Lung Metastases to Pneumothorax: An Amazing Response to Regorafenib in Metastatic Colorectal Cancer? A Case Report. acmcr [Internet]. 2020 Jan. 30 [cited 2026 Sep. 11];4(1):119-23. Available from: https://fortunejournals.org/ojs/index.php/acmcr/article/view/22285