Collaborative Stage Data Set - Revised 08/21/2010 FINAL

Thyroid

Histology Grade Extension Summary Stage Table

Note: For CS Extension code 560 ONLY, "Stated as T4a", the value of Summary Stage 1977 and Summary Stage 2000 is assigned on the basis of histology and grade as shown here.

ICD-O-3 histology code	Description	Grade	SS77 Map	SS2000 Map
8020	Carcinoma, undifferentiated, NOS	1,2,3,9	L	L
8021	Carcinoma, anaplastic, NOS	1,2,3,9	L	L
8030	Giant cell and spindle cell carcinoma	1,2,3,9	L	L
8031	Giant cell carcinoma	1,2,3,9	L	L
8032	Spindle cell carcinoma	1,2,3,9	L	L
*	Any histology	4	L	L
*	Any histology	5-8	ERROR	ERROR
*	All histologies except 8020, 8021, 8030, 8031, and 8032	1,2,3,9	RE	RE