Shaikh, Javeria, Saifullah Baig, Niaz Hussain Soomro, and Nisar Ahmed Rao. 2018. “Bilateral Hydropneumothorax in a Patient With Metastatic Gastric Adenocarcinoma of Signet Ring Morphology- An Unusual Presentation”. Pakistan Journal of Chest Medicine 24 (2):114-19. http://www.pjcm.net/index.php/pjcm/article/view/523.