What is Stage 4 SCLC?

Stage 4 SCLC, or Small Cell Lung Cancer, also known as extensive-stage SCLC, signifies that the cancer has metastasized or spread beyond its original location. It's comparable to stage 4 NSCLC (Non-Small Cell Lung Cancer) in this respect. According to provided reference, SCLC is considered extensive stage, if it has spread throughout the original lung, into the other lung or faraway lymph nodes, or to any other areas of the body.