Benign tumor

Unlike most benign tumors elsewhere in the body, benign brain tumors can be life threatening.

There are two main types of tumors: cancerous (malignant) tumors and benign (non-cancerous) tumors.

Benign tumors generally have a slower growth rate than malignant tumors and the tumor cells are usually more differentiated (cells have normal features).

These contrast with benign tumors, which do not spread.

Common examples of benign tumors include moles and uterine fibroids.

Acquired moles are a form of benign neoplasm, while congenital moles, or congenital nevi, are considered a minor malformation or hamartoma and may be at a higher risk for melanoma.

A benign tumor is a mass of cells (tumor) that lacks the ability to invade neighboring tissue (spread throughout the body) or metastasize.

Metastasis is one of the hallmarks of cancer, distinguishing it from benign tumors.

Examples include thyroid adenomas and adrenocortical adenomas.

A thyroid adenoma is a benign tumor of the thyroid gland, that may be inactive or active (functioning autonomously) as a toxic adenoma.

Pituitary adenomas can cause elevated levels of hormones such as growth hormone and insulin-like growth factor-1, which cause acromegaly; prolactin; ACTH and cortisol, which cause Cushings disease; TSH, which causes hyperthyroidism; and FSH and LH.

Non-invasive and non-secreting pituitary adenomas are considered to be benign in the literal as well as the clinical sense; however a recent meta-analysis (Fernández-Balsells, et al. 2011) of available research has shown there are to date scant studies – of poor quality – to either support or refute this assumption.

Although most benign tumors are not life-threatening, many types of benign tumors have the potential to become cancerous (malignant) through a process known as tumor progression.

A malignant tumor contrasts with a non-cancerous benign tumor in that a malignancy is not self-limited in its growth, is capable of invading into adjacent tissues, and may be capable of spreading to distant tissues.

Pituitary adenomas can cause elevated levels of hormones such as growth hormone and insulin-like growth factor-1, which cause acromegaly; prolactin; ACTH and cortisol, which cause Cushings disease; TSH, which causes hyperthyroidism; and FSH and LH.

In more than 95% of cases the excess production is due to a benign tumor, known as a pituitary adenoma.

Although they all have distinct clinical features, the formation of hamartomas is present in all four syndromes.

Additionally, the definition of hamartoma versus benign neoplasm is often unclear, since both lesions can be clonal.

Proteus syndrome is characterised by nevi, asymmetric overgrowth of various body parts, adipose tissue dysregulation, cystadenomas, adenomas, vascular malformation. Adenomas are benign tumors of gland-forming cells, and are usually specified further by their cell or organ of origin, as in hepatic adenoma (a benign tumor of hepatocytes, or liver cells).

An adenoma is a benign tumor of epithelial tissue with glandular origin, glandular characteristics, or both.

Von Hippel-Lindau disease is a dominantly inherited cancer syndrome that massively increases the risk of various tumors including benign hemangioblastomas and malignant pheochromocytomas, renal cell carcinomas, pancreatic endocrine tumors and endolymphatic sac tumors.

It is characterized by visceral cysts and benign tumors with potential for subsequent malignant transformation.

A benign tumor is a mass of cells (tumor) that lacks the ability to invade neighboring tissue (spread throughout the body) or metastasize.

ICD-10 classifies neoplasms into four main groups: benign neoplasms, in situ neoplasms, malignant neoplasms, and neoplasms of uncertain or unknown behavior.

Teratomas contain many cell types such as skin, nerve, brain and thyroid, among others, because they are derived from germ cells.

Mature teratomas include dermoid cysts and are generally benign.

A papilloma (plural papillomas or papillomata) (papillo- + -oma) is a benign epithelial tumor growing exophytically (outwardly projecting) in nipple-like and often finger-like fronds.

Pituitary adenomas can cause elevated levels of hormones such as growth hormone and insulin-like growth factor-1, which cause acromegaly; prolactin; ACTH and cortisol, which cause Cushings disease; TSH, which causes hyperthyroidism; and FSH and LH.

The most common cause of hyperthyroidism in cats is the presence of benign tumors called adenomas.

A squamous cell papilloma is a generally benign papilloma that arises from the stratified squamous epithelium of the skin, lip, oral cavity, tongue, pharynx, larynx, esophagus, cervix, vagina or anal canal.

It is a benign tumor.

Hemangiomas are benign (noncancerous) vascular tumors, and many different types occur.

Adenomas are benign tumors of gland-forming cells, and are usually specified further by their cell or organ of origin, as in hepatic adenoma (a benign tumor of hepatocytes, or liver cells).

There are also many pediatric liver diseases, including biliary atresia, alpha-1 antitrypsin deficiency, alagille syndrome, progressive familial intrahepatic cholestasis, Langerhans cell histiocytosis and hepatic hemangioma a benign tumour the most common type of liver tumour, thought to be congenital.

This disorder presents with many benign hamartomatous tumors including angiofibromas, renal angiomyolipomas, pulmonary lymphangiomyomatosis.

It occurs in more than 30% of women with tuberous sclerosis complex (TSC-LAM), a heritable syndrome that is associated with seizures, cognitive impairment and benign tumors in multiple tissues.

Tumors made up of cartilage tissue, either benign or malignant, can occur.

Intravascular leiomyomatosis is a benign neoplasm that extends through the veins; angioleiomyoma is a benign neoplasm of the extremities; vascular leiomyosarcomas is a malignant neoplasm that can be found in the inferior vena cava, pulmonary arteries and veins, and other peripheral vessels.

A benign tumor is a mass of cells (tumor) that lacks the ability to invade neighboring tissue (spread throughout the body) or metastasize.

A benign tumor is a mass of cells (tumor) that lacks the ability to invade neighboring tissue (spread throughout the body) or metastasize.

Benign tumors generally have a slower growth rate than malignant tumors and the tumor cells are usually more differentiated (cells have normal features).