Annals of Hepato-Biliary-Pancreatic Surgery

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Table. 1.

Table. 1.

Extragonadal teratomas classification [10]

Tumor elements Gonzalez-Crussi grading system
Benign teratomas
Mature teratoma Grade 0: All components are well differentiated
Grade 1: Microscopic foci contain incompletely differentiated tissues, not exceeding 10 percent
Immature teratoma, benign Grade 2: Immature tissues make up between 10 and 50 percent of the sample
Grade 3: Over half of the surface is composed of undifferentiated tissues of uncertain metastatic potential
Malignant teratomas
With areas of germ cell tumor Germinoma
Embryonal Carcinoma
Choriocarcinoma
Yolk sac tumor
Mixed
With nongerminal malignant tumor pattern Carcinoma
Sarcoma
Malignant embryonal tumor
Mixed
Inmature teratoma, malignant A teratoma that would otherwise be classified as benign inmature teratoma, but which subsequently became metastatic
Ann Hepatobiliary Pancreat Surg 2021;25:544-50 https://doi.org/10.14701/ahbps.2021.25.4.544
© 2021 Ann Hepatobiliary Pancreat Surg