In the sentence extracted from biomedical literature, identify all the disease entities. The required answer format is the same sentence with HTML <span> tags to mark up specific entities. 
### Entity Markup Guides:
Use <span class="disease"> to denote a disease.

### Input Text: Mutations in BRCA1 account for approximately 45 % of familial breast cancer and 90 % of inherited breast / ovarian cancer , whereas mutations in BRCA2 account for a comparable percentage of inherited breast cancer cases .
### Output Text:
Mutations in BRCA1 account for approximately 45 % of <span class="disease">familial breast cancer</span> and 90 % of <span class="disease">inherited breast / ovarian cancer</span> , whereas mutations in BRCA2 account for a comparable percentage of <span class="disease">inherited breast cancer</span> cases . 