The 26 French breast cancer families analysed by BRCA1 and BRCA2 bar codes
| IC family | Predisposition probability (%) | Age at diagnosis (y) of breast tumour for index cases | No of breast tumours in the family |
|---|---|---|---|
| *Three of the 26 families comprised a male breast cancer. Predisposition probabilities of index cases range from 90 to 98% (average 92%). The number of breast tumours in the family varies from 3 to 8 (average 4.5). | |||
| 25 | 90 | 33 | 3 |
| 343 | 90 | 46 | 5 |
| 1008 | 90 | 44 | 5 |
| 1077 | 90 | 33 | 8 |
| 1110 | 90 | 45 | 3* |
| 1185 | 90 | 43 | 4 |
| 1205 | 90 | 47 | 4 |
| 1421 | 90 | 36 | 4 |
| 1422 | 90 | 30 | 3 |
| 1679 | 90 | 48 | 5 |
| 1782 | 90 | 44, 67 | 5 |
| 2054 | 90 | 47 | 3 |
| 2232 | 90 | 44 | 4* |
| 2240 | 91 | 56 | 4 |
| 648 | 92 | 37, 38 | 3 |
| 59 | 93 | 56 | 6 |
| 392 | 93 | 61, 65 | 4* |
| 995 | 93 | 35 | 3 |
| 1189 | 93 | 32 | 3 |
| 1843 | 93 | 29 | 4 |
| 2229 | 93 | 37 | 4 |
| 2208 | 94 | 46 | 6 |
| 1743 | 95 | 46 | 7 |
| 179 | 97 | 36 | 6 |
| 833 | 97 | 27 | 3 |
| 2259 | 98 | 38 | 7 |