This abnormal growth usually forms a mass, which may be called a tumour or tumor. ICD-10 classifies neoplasms into four main groups: benign neoplasms, in...

A brain tumor occurs when abnormal cells form within the brain. There are two main types of tumors: malignant (cancerous) tumors and benign (non-cancerous)...

A benign tumor is a mass of cells (tumor) that does not invade neighboring tissue or metastasize (spread throughout the body). Compared to malignant (cancerous)...

Neuroendocrine tumors (NETs) are neoplasms that arise from cells of the endocrine (hormonal) and nervous systems. They most commonly occur in the intestine...

the term is typically used when referring to metastasis by a cancerous tumor. The newly pathological sites, then, are metastases (mets). It is generally...

tumors into cartilage tumors, osteogenic tumors, fibrogenic tumors, vascular tumors of bone, osteoclastic giant cell-rich tumors, notochordal tumors,...

invade or spread to other parts of the body. These contrast with benign tumors, which do not spread. Possible signs and symptoms include a lump, abnormal...

A primary tumor is a tumor growing at the anatomical site where tumor progression began and proceeded to yield a cancerous mass. Most solid cancers develop...

A pelvic tumor is any one of the numerous tumors that occur in the pelvis. Within the pelvis, these tumors may involve specific organs or tend to occupy...

A Pancoast tumor is a tumor of the apex of the lung. It is a type of lung cancer defined primarily by its location situated at the top end of either the...

Tumor antigen is an antigenic substance produced in tumor cells, i.e., it triggers an immune response in the host. Tumor antigens are useful tumor markers...

Lung tumors are neoplastic lung nodules. These include: Primary tumors of the lung/pulmonary system: Bronchial leiomyoma, a rare, benign tumor Lung cancer...

Wilms' tumor or Wilms tumor, also known as nephroblastoma, is a cancer of the kidneys that typically occurs in children (rarely in adults), and occurs...

Bowie (born February 14th, 1990), best known by the recording alias Yves Tumor, is an American musician and producer of experimental music, born in Miami...

Askin's tumor is a rare, primitive neuroectodermal tumor which arises from the soft tissues of the chest wall, particularly of the paravertebral region...

Warthin's tumor, also known as papillary cystadenoma lymphomatosum, is a benign cystic tumor of the salivary glands containing abundant lymphocytes and...

Liver tumors (also known as hepatic tumors) are abnormal growth of liver cells on or in the liver. Several distinct types of tumors can develop in the...

growth. This is a step toward tumor progression. In order for a tumor cell to survive, it must decrease its expression of tumor suppressor genes such as p53...

Tumor hypoxia is the situation where tumor cells have been deprived of oxygen. As a tumor grows, it rapidly outgrows its blood supply, leaving portions...

Mutagens, substances that cause cancer can be tumor initiators. Tumor promotion Tumor progression "tumor initiation". National Cancer Institute. Retrieved...

A papillary tumor is a tumor shaped like a small mushroom, with its stem attached to the epithelial layer (inner lining) of an organ. It consists of papillae...

Spinal tumors are neoplasms located in either the vertebral column or the spinal cord. There are three main types of spinal tumors classified based on...

Tumor necrosis factor (TNF, cachexin, or cachectin; formerly known as tumor necrosis factor alpha, TNFα [without a dash in between] or TNF-α [with a dash])...

A mastocytoma or mast cell tumor is a type of round-cell tumor consisting of mast cells. It is found in humans and many animal species; it also can refer...

Glomus tumor was also the name formerly (and incorrectly) used for a tumor now called a paraganglioma. A glomus tumor (also known as a "solitary glomus...

Ovarian cancer is a cancerous tumor of an ovary. It may originate from the ovary itself or more commonly from communicating nearby structures such as...

Ovarian tumors, or ovarian neoplasms, are tumors found in the ovary. They can be benign or malignant (ovarian cancer). They consist of mainly solid tissue...

A vascular tumor is a tumor of vascular origin; a soft tissue growth that can be either benign or malignant, formed from blood vessels or lymph vessels...

A mixed tumor is a tumor that derives from multiple tissue types. A biplastic tumor or biphasic tumor has two tissue types. A true mixed tumor contains...

The tumor microenvironment is a complex ecosystem surrounding a tumor, composed of cancer cells, stromal tissue (including blood vessels, immune cells...