Which type of tumor is typically malignant?

Carcinomas are a type of malignant tumor that arises from epithelial cells, which line the surfaces of organs and structures throughout the body. Malignant tumors, including carcinomas, have the ability to invade surrounding tissues and spread to other parts of the body through the bloodstream or lymphatic system, a process known as metastasis. This characteristic distinguishes them from benign tumors, which do not invade surrounding tissues or metastasize.

In contrast, benign tumors, cysts, and fibroids are generally non-cancerous. Benign tumors are typically localized and do not pose a threat to life. Cysts are often fluid-filled sacs that can occur in various tissues but are not inherently malignant. Fibroids, particularly uterine fibroids, are also typically benign growths that can cause symptoms but do not metastasize. Therefore, carcinomas are specifically recognized for their malignant nature and associated risks.