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An immature teratoma is a teratoma that contains anaplastic immature elements, and is often synonymous with malignant teratoma. [1] A teratoma is a tumor of germ cell origin, containing tissues from more than one germ cell line, [2] [3] [4] It can be ovarian or testicular in its origin.
Immature teratoma is the malignant counterpart of the mature teratoma and contains immature tissues which typically show primitive or embryonal neuroectodermal histopathology. Immature teratoma has one of the lowest rates of somatic mutation of any tumor type and results from one of five mechanisms of meiotic failure .
Sacrococcygeal teratomas are benign 75% of the time, malignant 12% of the time, and the remainder are considered "immature teratomas" that share benign and malignant features. Benign sacrococcygeal teratomas are more likely to develop in younger children who are less than 5 months old, and older children are more likely to develop malignant ...
Immature teratomas contain immature or embryonic tissue which significantly differentiates them from mature teratomas as they carry dermoid cysts. [5] It is commonly observed in 15 to 19-year-old women and rarely in women after menopause. [6] Immature teratomas are characterized with a diameter of 14–25 cm, encapsulated mass, cystic areas ...
Teratoma including mature teratoma, dermoid cyst, immature teratoma, teratoma with malignant transformation 9080/0-9080/3 0–3, 15–30 Mature teratoma, dermoid cyst usually benign (but follow-up required); others usually malignant Very variable, but "normal" tissues are common Pure tumors do not secrete hCG, AFP Polyembryoma: 9072/3 15–25 ? ? ?
10.1 Mature teratoma 10.2 Immature teratoma 10.3 Teratoma with somatic-type malignancy 10.4 Germinoma 10.5 Embryonal carcinoma 10.6 Yolk sac tumor 10.7 Choriocarcinoma
Masses in the anterior portion of the mediastinum can include thymoma, lymphoma, pheochromocytoma, germ cell tumors including teratoma, thyroid tissue, and parathyroid lesions. Masses in this area are more likely to be malignant than those in other compartments.
Mature cystic teratoma: 46.0%: 0.17% to 2% [6] Cystic, with elements of all 3 germ layers (endoderm, mesoderm and ectoderm). [7] Hair follicles. Immature teratoma: 2.5%: 100%: A teratoma that contains anaplastic immature elements, and is often synonymous with malignant teratoma. [8] Other germ cell tumors 3.0%