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: The remaining eight cases ( 89 % ) of male breast cancer with a family history of breast / ovarian cancer in first - degree relatives remain unaccounted for by mutations in either the BRCA1 gene or the BRCA2 gene . .
### Output Text:
The remaining eight cases ( 89 % ) of <span class="disease">male breast cancer</span> with a family history of <span class="disease">breast / ovarian cancer</span> in first - degree relatives remain unaccounted for by mutations in either the BRCA1 gene or the BRCA2 gene . . 