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Classification of tumors:
Topography and Morphology
To register
Topography
Morphology
To predict
Prognostic factors
Grading
Staging systems
Residual disease
Prognostic score
(...)
ICD-O
http://www.who.int/classifications/icd/adaptations/oncology http://training.seer.cancer.gov/module_icdo3/icdo3_home.html