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Case Example 7 (Primary Site and Histology)
Patient presents with palpable cervical lymphadenopathy. An MRI of the Head and Neck is done showing extensive cervical lymphadenopathy. PET scan ordered showing lymph nodes above and below the diaphragm. Biopsy diagnosis is diffuse large B-cell lymphoma (DLBCL). Bone marrow done which is positive for DLBCL.
| Involvement | Comments |
|---|---|
| Lymph nodes | Cervical lymphadenopathy, lymph nodes above and below the diaphragm |
| Organ involvement | None |
| Common metastatic sites | Bone marrow |
Coding of the case (Lymphoma schema)
| Data Item | Coding |
|---|---|
| M Rule | M2. Single histology |
| PH Rule | PH21: Multiple lymph nodes |
| Primary site | C778: Multiple lymph node regions |
| Histology | 9680/3: DLBCL |
| Diagnostic confirmation | 1 (positive histology) |
| EOD Primary Tumor | 800 (due to positive bone marrow) |
| EOD Regional Nodes | 888 (not applicable) |
| EOD Mets | 88 (not applicable) |
| Summary Stage | 7 (distant due to positive bone marrow) |
| Mets at Dx Data Items (all 6) | Mets at Dx Other: 1 (bone marrow), Mets at Dx-Distant lymph nodes: 8, remaining Mets at Dx data items: 0 |
Updated: December 2, 2025