| Asymptomatic lesions | MALT lymphoma |
| Serum para-proteins and/or increased LDH | |
| Collagen-vascular disease | MALT lymphoma in collagen-vascular disorders (e.g. Sjögren) |
| Immunodeficiency | Lymphomatoid granulomatosis in HIV |
| Lymphomatoid granulomatosis in Wiskott–Aldrich syndrome | |
| Transplantation | Post-transplant lymphoproliferative processes |
| Respiratory symptoms | T-cell lymphomas |
| Lymphopenia and/or eosinophilia | Granulomatous mycosis fungoides |
| Hodgkin lymphoma | |
| Thromboembolism | Intravascular lymphoma |
| Acute pulmonary hypertension-like onset | |
| Increased LDH and/or hypercalcaemia | |
| Haemophagocytic syndrome# | NK-/T-cell lymphoma, nasal type |
| T-cell lymphoma | |
| Organising pneumonia | Hodgkin lymphoma |
| Lymphomatoid granulomatosis | |
| Treatment with methotrexate, natalizumab or other drugs | Atypical lymphoproliferative processes |
MALT: mucosa-associated lymphoid tissue; LDH: lactate dehydrogenase; NK: natural killer cell. #: abrupt onset, increased triglycerides, increased ferritin, coagulation abnormalities, increased transaminases, and decreased fibrinogen and cytopenia/pancytopenia.