primary intracranial teratoma

Microscopic pathology: 1) tumor composed of different tissue types originating from ectoderm, endoderm & mesoderm 2) subclassification: a) mature teratoma - composed of fully differentiated tissues - mitoses absent or rare. b) immature teratoma - composed of incompletely differentiated tissues sometimes resembling fetal tissue - mitoses typically present. c) teratoma with malignant transformation - contains malignant components such as sarcoma, squamous cell carcinoma, adenocarcinoma

General

primary intracranial germ cell neoplasm teratoma; dermoid

References

WHO International Histological Classification of Tumors. Histological Typing of Tumours of the Central Nervous System. Kleihues et al. Springer-Verlag 2nd ed. 1993