08/02/2014
Common types of benign tumours
There are many different types of benign tumours arising from different structures in the body. These are some of the most common types of benign tumours:
Adenomas are benign tumours starting in the epithelial tissue of a gland or gland-like structure. The epithelial tissue is the thin layer of tissue covering organs, glands and other structures. A common type of adenoma is a polyp in the colon. Adenomas might also grow in the liver or the adrenal, pituitary or thyroid gland.
In most cases adenomas can be removed with surgery. Although not common, this type of tumour can become malignant.
Fibromas are tumours of fibrous or connective tissue that can grow in any organ.
Another type of fibrous tissue tumour is a desmoid tumour. These tumours can cause problems by growing into nearby tissues.
Because they can cause symptoms, fibrous tissue tumours may need to be removed with surgery.
Haemangiomas are a build-up of blood vessel cells in the skin or internal organs. Haemangiomas are a common type of birthmark, often occurring in the head, neck or trunk. They may appear red or bluish in colour. Most go away on their own. Those that interfere with vision, hearing or eating may require treatment.
Lipomas grow from fat cells. They are the most common benign tumour in adults, often found in the neck, shoulders, back or arms. Lipomas are slow growing, usually round and movable, and soft to the touch. They may run in families and sometimes they result from an injury. Treatment may be needed if a lipoma is painful or growing quickly. This may include steroid injections or removal through liposuction or surgery.
Two other types of benign fat tumours are lipoblastomas, which occur in young children, and hibernomas.
Meningiomas are tumours that develop from the membrane surrounding the brain and spinal cord. About nine out of 10 are benign. Many grow slowly, but others grow more quickly. Treatment varies depending on the location of the meningioma and the symptoms it causes. Symptoms may include headache and weakness on one side, seizures, personality changes and visual problems.
Sometimes the doctor will choose to monitor the tumour for a time. If surgery is needed, its success depends on your age, the location of the tumour and whether it is attached to anything. Radiotherapy may be used for tumours that can't be surgically removed.
Myomas are tumours that grow from muscle. Leiomyomas grow from smooth muscle, which is found in internal organs such as the stomach and uterus. They can start in the walls of blood vessels. In the wall of the uterus, leiomyomas are often called fibroids. Although not cancerous, uterine fibroids can cause heavy va**nal bleeding, bladder problems or pelvic pain or pressure. A rare benign tumour of skeletal muscle is rhabdomyoma. These tumours may be simply watched. To address symptoms, they may be shrunk with medication or removed with surgery.
Naevi (moles) are growths on the skin. They can range in colour from pink and tan to brown or black. You may develop new moles until you are about 40 years old. Moles that look different than ordinary moles (dysplastic naevi) may be more likely to develop into a type of skin cancer (malignant melanoma). For this reason it is important to have your skin checked by a healthcare professional if you notice a change. This is especially true if your moles look unusual, grow or change in shape, have irregular borders or change in colour or change in any other way. Sometimes it is necessary to remove a mole like this to check it for signs of cancer.
Neuromas grow from nerves. Two other types of nerve tumours are neurofibromas and schwannomas. These benign nerve tumours can occur almost anywhere in nerves that run throughout the body. Neurofibromas are more common in people with an inherited condition called neurofibromatosis. Surgery is the most common type of treatment for benign nerve tumours.
Osteochondromas are the most common type of benign bone tumour. These tumours usually appear as a painless bump or bumps near the joint such as the knee or shoulder. Often, the doctor will simply monitor this benign tumour with X-rays. Surgery may be needed if the tumour causes symptoms such as pain or pressure on nerves or blood vessels.
Papillomas are tumours that grow from epithelial tissue and project in finger-like fronds. They can grow in the skin, cervix, breast duct or mucous membrane covering the inside of the eyelid (conjunctiva), for example. These tumours can result from direct contact with an infection such as human papillomavirus (HPV). Some types of papillomas go away on their own. In some cases surgery is needed to rule out cancer.