Table 1. Demographic and histological characteristics of pulmonary MALT lymphomas and controls from different geographical areas.
| Diagnosis | UKa | Germanyb | Italyc |
|---|---|---|---|
| No. of patients | |||
| MALT L | 35 | 21 | 13 |
| Other-LPD | — | 20 | 10 |
| Non-LPD | 20 | 24 | — |
| Median age (range) | |||
| MALT L | 56 (37–78) | 59 (35–78) | 60 (35–84) |
| Other-LPD | — | 59 (16–84) | 53 (31–77) |
| Non-LPD | 48 (14–66) | 60 (24–75) | — |
| Male/female ratio | |||
| MALT L | 1.1 | 1.3 | 1.2 |
| Other-LPD | — | 1.2 | 0.4 |
| Non-LPD | 1 | 2.4 | — |
LPD=lymphoproliferative disorder; MALT L=mucosa-associated lymphoid tissue lymphoma.
A total of 34 cases of MALT lymphoma from London and one case of MALT lymphoma from Cambridge. Control group includes 20 cases of non-lymphoproliferative disorders (mostly pneumonia and bronchiectasis) from London.
All cases from Würzburg. Control groups consists of 20 cases of lymphoproliferative disorders other than MALT lymphoma (nine diffuse large B-cell lymphomas, three Hodgkin's lymphomas, two lymphomatoid granulomatosis, three mediastinal/anaplastic large cell lymphomas, one plasmocytoma, one mantle cell lymphoma and one NK-cell lymphoma) and 24 cases of non-lymphoproliferative disorders (mainly carcinomas).
A total of nine cases of MALT lymphoma from Ancona and the remaining four cases from Bologna. Control group includes 10 cases of lymphoproliferative disorders other than MALT lymphoma (five diffuse large B-cell lymphomas, two follicular bronchiolitis, one mantle cell lymphoma, one Hodgkin's lymphoma and one lymphoplasmacytic lymphoma).