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WHO Classification of CNS Tumors
Moderator:Dr Partha PratimTalukdar
Associate Prof. , Dept of Pathology
Tezpur MedicalCollegeHospital
Presenter:Dr LekhraajGautam,PGT
Departmentof Pathology,TMCH
5th Edition of WHO Classification is based on-
2016 edition
Recommendations of c- IMPACT NOW
GENERAL CHANGES:
 CNS Tumor Taxonomy
 CNS Tumor Nomenclature
 Tumor Grading
 NOS and NEC Diagnosis
 Integrated and Layered Diagnosis
CNS Tumor Taxonomy
Hybrid taxonomy:
CNS Tumor Nomenclature
Tumor Grading:
Tumor Grading(Contd..)
Neoplasms are graded within types rather then grading
across different types.
 Diffuse Astrocytoma
 Anaplastic Astrocytoma
 IDH Mutant Glioblastoma
Astrocytoma IDH Mutant, WHO Grade 2, 3, 4
Tumor Grading(Contd..)
SPECIFIC CHANGES
GLIOBLASTOMA IDH Wildtype
PLNTY
Polymorphous low-grade neuroepithelial tumor of young
Pilocytic Astrocytoma
THANK YOU

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CNS PPT.pptx