Table 6.

Distributions of coder-assigned histologic subtype grouping for patients originally reported with unclassified subtype compared with SEER program data from the same time period

Coder-assigned ICD-O-3 grouping*1988-1994
1998-2000
Coder, n (%)SEER (%)Coder, n (%)SEER (%)
Burkitt6 (6)27 (9)2
DLBCL41 (41)5430 (38)50
Marginal zone7 (7)02 (3)0
Follicular25 (25)238 (10)21
Lymphoplasmacytic0 (0)15 (6)2
Mantle cell7 (7)20 (0)5
SLL/CLL13 (13)1111 (14)9
MF/Sezary0 (0)40 (0)4
Peripheral T cell0 (0)212 (15)4
Other T cell/NK0 (0)15 (6)3
Total99 (100)10080 (100)100
  • Abbreviations: CLL, chronic lymphocytic leukemia; SLL, small lymphocytic lymphoma; MF, mycosis fungoides; SEER, Surveillance, Epidemiology, and End Results.

  • * ICD-O-3 code groupings for lymphoma subtypes are as follows: Burkitt (codes 9687 and 9826), DLBCL (codes 9675, 9678-9680, and 9684), marginal zone (codes 9689 and 9699), follicular (codes 9690, 9691, 9695, and 9698), lymphoplasmacytic (codes 9671 and 9761), mantle cell (codes 9673), SLL/CLL (codes 9670 and 9823), MF/Sezary disease (codes 9700-9701), peripheral T cell (codes 9702, 9705, 9708, 9714, 9716, and 9827), NK/other T cell (codes 9709, 9717-9719, 9831, and 9948), other/unknown type (codes 8000, 8140, 8263, 8586, 9590-9591, 9596, 9820, 9867, and 9970).

  • Cases ages 21 to 74 years diagnosed with NHL (codes 9670-9719) from 1988 to 1994 while residing in six county geographic region.

  • Cases of all ages diagnosed with NHL (codes 9670-9719) from 1998 to 2000 while residing in six county geographic region.