<stage>
1. only one node
2. > 2 nodes at the same side of diaphragm
3. > 2 nodes at different side of diaphragm
4. distant metastasis

<symptom>
Fever > 100F -|
Weight loss > 10% |--within=A, without=B
night sweating -|

<therapy>
1A.2A.1B.2B --> radiotherapy
3A.4A.3B.4B --> radiotherapy+chemotherapy+(immunotherapy)

if someone is in the stage of 1A, 1B, 2A or 2B, radiotherapy get effective in treating lymphoma.
I don't know whether lymphoma can be fully recovered or not, but there is someone who have gotten lymphoma more than 10 years and he is still fine.