What is a tumor? A tumor, or neoplasm, is a mass of abnormal cells that form in your body. Tumors can affect tissues, glands, organs, skin and bone. They can be big or small. You can …

Jun 10, 2025 · A neoplasm, or tumor, is an abnormal growth of tissue that can be benign or cancerous. Medical oncologist Matthew Wright, M.D., shares what you should know about …

Mar 31, 2025 · When a neoplasm forms into an abnormal growth, mass, or lesion, it’s called a tumor. Unlike cysts, tumors are usually solid and firm because they are filled with clumps of …

Nov 21, 2025 · In men the most frequently affected sites are the prostate, the lung, and the colon. Each tumor site and type presents its own specific set of clinical manifestations. However, …

Nov 16, 2023 · There are three main types of tumor; benign, premalignant, and malignant. If someone has a malignant tumor, it is cancerous. Other types of tumor are not cancerous.

Dec 8, 2025 · The terms tumour and cancer can refer to different types of lumps and bumps. But the terms are often confused and misused – by the general public and even health …

tumor (TOO-mer) An abnormal mass of tissue that forms when cells grow and divide more than they should or do not die when they should. Tumors may be benign (not cancer) or malignant …

Jul 29, 2024 · A tumor is a cluster of abnormally growing cells that may or may not be cancerous. This article overviews the types, how they look, and diagnosis.

Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body. [2][7] These contrast with benign tumors, which do not …

These extra cells can form a mass of tissue called a growth or tumor. There are two types of tumors: benign tumors, which are not cancerous, and malignant tumors, which are cancerous. …