Is choristoma a tumor?
A choristoma is a developmental tumor-like growth of microscopically normal tissue in an abnormal location. The most common type of oral choristoma is composed of bone, cartilage, or both.
Is choristoma neoplastic?
Choristomas, a form of heterotopia, are masses of normal tissues found in abnormal locations. In contrast to a neoplasm or tumor, the growth of a choristoma is normally regulated. It is different from a hamartoma.
What is the difference between hamartoma and choristoma?
Hamartomas are an overgrowth of mature tissues that normally occur in an area of the body, but with disorganization and often with one element predominating. Choristomas on the other hand, are a mass of tissue histologically normal for a part of the body other than the one in which it is located (heterotopic/ectopic).
What is osseous choristoma?
Osseous choristoma is a very rare, benign lesion in the maxillofacial region. It appears as a benign mass of normally matured bony tissue covered by the normal epithelium of the tongue.
Is choristoma benign or malignant?
Choristoma is a rare benign tumour consisting of microscopically normal tissue derived from germ cell layers foreign to that body site. Choristomas are classified according to their type of tissue. They sometimes arise within the skin or oral cavity, and can also occur in internal organs.
Is teratoma a choristoma?
By strict definition, a mature teratoma contains all three germinal layers. 3. Choristoma: A mass of histologically normal tissue in an abnormal location.
Is a choristoma a teratoma?
What causes choristoma?
Choristoma is a developmental abnormality. For example, a dermoid cyst arises from epithelium trapped along lines of embryonic fusion. The reason they present late in life in some cases is unknown. One theory is that it may be due to chronic irritation.
Is Choristoma benign or malignant?
Is teratoma benign or malignant?
Types of Teratoma Mature teratomas tend to be benign, or non-cancerous. Mature teratomas can present in different ways. They may be: Solid – made of tissue, but not enclosed.
Does a teratoma need to be removed?
Teratomas are usually benign in newborns, but may still require surgical removal.
Is a teratoma a baby?
What is a teratoma? A teratoma is a congenital (present prior to birth) tumor formed by different types of tissue. Teratomas in newborns are generally benign and don’t spread. They can, however, be malignant, depending on the maturity and other types of cells that may be involved.
What is the medical definition of a choristoma?
cho·ris·to·ma. A mass formed by maldevelopment of tissue of a type not normally found at that site. choristoma. /cho·ris·to·ma/ (ko″ris-to´mah) a mass of histologically normal tissue in an abnormal location.
When does a choristoma have a Mass Effect?
Non-specialised tissue (chorista) that develops in utero and corresponds to normal cells and tissues located in abnormal sites (e.g., ectopic breast, liver or other tissues), which are called choristomas when they have a mass effect. Segen’s Medical Dictionary. © 2012 Farlex, Inc.
How is a mass formed in a Chorista?
A mass formed by maldevelopment of tissue of a type not normally found at that site. Non-specialised tissue (chorista) that develops in utero and corresponds to normal cells and tissues located in abnormal sites (e.g., ectopic breast, liver or other tissues), which are called choristomas when they have a mass effect.
When do you find out you have choristoma?
An osseous or cartilaginous choristoma usually appears as a painless, slow-growing, hard mass that often appears pedunculated. Such lesions are diagnosed most frequently in the second and third decades of life, with a 3 : 1 female-to-male predilection.