WHO Clinical Staging System for Lymphoma in Domestic Animals
Stage* | Description |
|---|---|
I | Involvement limited to a single node or lymphoid tissue in a single organ (excluding bone marrow) |
II | Involvement of many lymph nodes in a regional area (with or without involvement of the tonsils) |
III | Generalized lymph node involvement |
IV | Stage I, II, or III with liver or spleen involvement |
V | Stage I, II, III, or IV with manifestation in the blood and involvement of bone marrow or other organ systems |
* Each stage is further classified into substages based on the presence of systemic signs: substage a = absence of systemic signs; substage b = presence of systemic signs (fever, > 10% weight loss, hypercalcemia) | |
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