Table 3

Estimated impact of expert review on non-Hodgkin’s lymphoma (NHL) subtype distribution in Surveillance, Epidemiology, and End Results program data, 1988–1994

ICD-O-2 codesaOriginal distributionDistribution after expert reviewChange in distribution (%)
n (%)n (%)
9590–95954,038 (14)2,046 (7)−7
96702,385 (8)2,772 (10)+2
96721,221 (4)109 (0)−4
9673403 (1)1,177 (4)−3
96751,410 (5)1,389 (5)0
96807,189 (25)9,132 (32)+7
9681438 (2)280 (1)−1
9682778 (3)1,133 (4)+1
96842,147 (8)1,637 (5)−3
9685306 (1)258 (1)0
9686608 (2)870 (3)+1
9687345 (1)293 (1)0
9690331 (1)13 (<1)−1
96911,527 (5)1,436 (5)0
96951,643 (6)2,560 (9)+3
9698807 (3)1,304 (4)+1
9700763 (3)733 (2)−1
971146 (<1)223 (1)+1
Obsolete codesb1,341 (5)0 (0)−5
Codes not re-reviewedc847 (3)847 (3)0
Re-reviewed as non-NHLd0 (0)227 (1)+1
Total28,573 (100)28,439 (100)
  • a ICD-O-2, International Classification of Diseases for Oncology, 2nd edition. Designations include 9590–9595, lymphoma, not otherwise specified (NOS); 9670, small lymphocytic; 9671, lymphoplasmacytic; 9672, small cleaved cell, diffuse; 9673, lymphocytic, intermediate differentiation, diffuse; 9675, mixed small and large cell, diffuse; 9680, large cell, diffuse; 9681, large cell, cleaved, diffuse; 9682, large cell, noncleaved, diffuse; 9684, immunoblastic; 9685, lymphoblastic; 9686, small cell, noncleaved, diffuse; 9687, Burkitt’s lymphoma; 9690, follicular, NOS; 9691, mixed small cleaved and large cell, follicular; 9695, small cleaved cell, follicular; 9698, large cell, follicular; 9700, mycosis fungoides; and 9711, monocytoid B-cell lymphoma.

  • b Obsolete codes were not utilized by the expert reviewer and included 9693, (lymphocytic, well-differentiated, nodular), 9696, (lymphocytic, poorly differentiated nodular), 9701, (Sezary’s disease), 9702, (peripheral T-cell, NOS), 9704, (lymphoepitheloid), or 9709, (cutaneous).

  • c Codes not re-reviewed were generally rare subtypes not represented in the original case series; these included 9674 (centrocytic), 9676 (centroblastic-centrocytic, diffuse), 9692, (centroblastic-centrocytic, follicular), 9697 (centroblastic, follicular), 9703 (T-zone), 9705 (peripheral T-cell angioimmunoblastic lymphadenopathy with dysproteinemia), 9706 (peripheral T-cell, pleomorphic small cell), 9707 (peripheral T-cell, pleomorphic medium and large cell), 9712 (angioendotheliomatosis), 9713 (angiocentric T-cell), and 9714 (large cell Ki-1+).

  • d Totals differ due to rounding.