Kadish staging of olfactory neuroblastomas

Stage	Definition
A	Confined to nasal cavity
B	Involves the nasal cavity and one or more paranasal sinuses
C	Extending beyond the nasal cavity or paranasal sinuses
D	Regional lymph node or distant metastasis

Adapted from: Kadish S, Goodman M, Wang CC, Cancer 1976; 37:1571.

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