A Rare Cause of Acute Abdomen: Small Intestine Perforation Due to Metastasis of Lung Cancer Journal title: Istanbul Medical Journal Authors: Elchin Alizade, Mehmet İlhan, Baran Mollavelioğlu, İsmail Cem Sormaz, Erhan Eröz, Recep Erçin Sönmez Subject(s): Medicine