Table 1. Diagnostic Characteristics of 43 Patients With Primary ALCL in the Breast and 146 Patients With Primary Breast Lymphomas Other Than ALCL Included in the Case-Control Study.
| Characteristic | No. (%) | |
|---|---|---|
| Primary Breast ALCL | Primary Breast Lymphomas Other Than ALCLa |
|
| Year of diagnosis | ||
| 1990-1995 | 1 (2.3) | 5 (3.4) |
| 1996-2000 | 6 (14.0) | 20 (13.7) |
| 2001-2005 | 3 (7.0) | 12 (8.2) |
| 2006-2010 | 9 (20.9) | 56 (38.4) |
| 2011-2016 | 24 (55.8) | 53 (36.3) |
| Age at diagnosis, y | ||
| 18-35 | 4 (9.3) | 13 (8.9) |
| 36-50 | 14 (32.6) | 36 (24.7) |
| 51-75 | 23 (53.5) | 74 (50.7) |
| >75 | 2 (4.7) | 23 (15.8) |
| Breast implant | ||
| Yes | 32 (74.4) | 1 (0.7) |
| No | 11 (25.6) | 145 (99.3) |
Abbreviation: ALCL, anaplastic large-cell lymphoma.
a
Including diffuse large B-cell lymphoma (n = 95), Burkitt lymphoma (n = 7), marginal zone lymphoma, mucosa-associated lymphoid tissue-type (n = 22), follicular lymphoma (n = 10), nodal marginal zone lymphoma (n = 1), indolent B-cell lymphoma, unclassifiable (n = 9), peripheral T-cell lymphoma, not otherwise classified (CD30 negative, n = 3).