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)...

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

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...

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

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

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

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

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

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

Melanocytic tumors are tumors developed from melanocytes. Melanocytic nevus Melanocytic tumors of uncertain malignant potential Melanoma v t e...

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

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 Krukenberg tumor refers to a malignancy in the ovary that metastasized from a primary site, classically the gastrointestinal tract, although it can...

A borderline tumor, sometimes called low malignant potential (LMP) tumor, is a distinct but yet heterogeneous group of tumors defined by their histopathology...

Cartilage tumors, also known as chondrogenic tumors, are a type of bone tumor that develop in cartilage, and are divided into non-cancerous, cancerous...

"The Tumor" is a short story by John Grisham, telling about the focused ultrasound process through the case of a fictional character named Paul. This...

Phyllodes tumors (from Greek: phullon), are a rare type of biphasic fibroepithelial mass that form from the periductal stromal and epithelial cells of...

pancreatic tumor is an abnormal growth in the pancreas. In adults, almost 90% are pancreatic cancer and a few are benign. Pancreatic tumors are rare in...

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...

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...

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...

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 is a connective tissue tumor with a "myxoid" background, composed of clear, mucoid substance. This tumoral phenotype is shared by many tumoral entities:...

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

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 tumor marker is a biomarker that can be used to indicate the presence of cancer or the behavior of cancers (measure progression or response to therapy)...

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

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...

A mediastinal tumor is a tumor in the mediastinum, the cavity that separates the lungs from the rest of the chest. It contains the heart, esophagus, trachea...