Tumor composed of a number of different tissue types, none of which is normally found in the area of occurrence. Teratomas usually occur in the testes or ovaries.
A tumour, especially in an ovary or testis, which is formed of tissue not usually found in that part of the body.
Tumor made up of tissue not normally found at that site, occurring most often in the testes and ovaries; some can become malignant.
An abnormal growth, usually found in an ovary or testicle, formed from tissue that is not normally found in those organs. Teratomas can be benign or malignant and can consist of a mixture of tissues including cells from the epithelium, bone, hair, teeth, cartilage, or muscle.
A tumor composed of a number of tissues not usually found at that site. Teratomas most frequently occur in the testis and ovary, possibly derived from remnants of embryological cells that have the ability to differentiate into many types of tissue. Malignant teratoma of the testis is found in young men: it is most common in the undescended testis. Like seminoma, it frequently occurs as a painless swelling of one testis (pain is not a good indication that the swelling is benign). Treatment is by orchidectomy avoiding an incision into the scrotum. The tumor can spread to lymph nodes, lungs, and bone, treatment of which may involve the use of radiotherapy and drugs such as vinblastine, bleomycin, and platinum compounds. Teratomas often produce alpha-fetoprotein, beta human chorionic gonadotropin, or both; the presence of these substances in the blood is a useful indication of the amount of tumor and the effect of treatment.
A tumour that consists of partially developed embryonic tissues. The most common sites of this tumour are the ovary and the testicle.
A congenital tumor containing one or more of the three primary embryonic germ layers. Hair and teeth as well as endodermal elements may be present.
A primary tumor, which could be cancerous or noncancerous, composed of cells significantly different from those typically found in the specific region of the body. For instance, teratomas originating in the ovary frequently give rise to cysts that may encompass elements like skin, hair, teeth, or bone.
A tumor that contains teeth, hair, or other substances not typically found in the area where it develops; caused by the incorrect placement of tissue during fetal growth.