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 have a single tumor …

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 neoplasms.

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 abnormal cells. …

Nov 21, 2025 · Each tumor site and type presents its own specific set of clinical manifestations. However, there are a number of common clinical presentations, or syndromes, caused by many …

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.

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 spread. [7] Possible …

3 days ago · 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 professionals. For …

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.

2 days ago · The terms tumor 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 professionals.

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 (cancer). …