Hamartomas are benign (non-cancerous) tumors that are made up of an abnormal mixture of cells and tissues that are normally found in the area where the tumor develops. They can occur in various organs, including the lungs, brain, and skin, and often do not cause symptoms. These growths are usually discovered incidentally during imaging studies for other conditions. While hamartomas are generally harmless, their presence can sometimes lead to complications depending on their size and location, making medical evaluation important for proper management.