Solid tumors refer to a group of cancers that form solid masses of tissue rather than spreading throughout the bloodstream or lymphatic system. These tumors can develop in various organs and tissues in the body, including the lung, breast, prostate, and colon. Research in solid tumors focuses on understanding the genetic and molecular mechanisms underlying their development, growth, and spread. This research aims to identify new treatment strategies, such as targeted therapies and immunotherapies, to improve outcomes for patients with solid tumors. Additionally, researchers are studying ways to improve early detection and diagnosis of solid tumors to enable earlier and more effective treatment.