image (IMAGE) UT Southwestern Medical Center Caption Small cell lung cancer (SCLC) is a highly metastatic cancer. The liver is one of the common sites of metastases, as seen in this image of mouse liver with metastatic SCLC lesions. SCLC tumors are composed of tightly packed epithelial cells with few immune cells infiltrating inside the tumor. Credit UT Southwestern Medical Center Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.