Lymph node plasma cell analysis for MUM1, CD138 and Kappa:Lambda ratio
| Marker | Frequency |
| MUM1 | |
| 3+ | 1 (4%) |
| 2+ | 21 (84%) |
| 1+ | 3 (12%) |
| CD138 | |
| 0 (Predominantly negative) | 14 (56%) |
| 1+ | 11 (44%) |
| Kappa:lambda | |
| Polytypic | 4 (16%) |
| >3:1; kappa excess | 18 (72%) |
| <1:2; lambda excess | 1 (4%) |
| Too few to assess | 2 (8%) |