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: Among family members , an average age of less than 55 years at the diagnosis of breast cancer , the presence of ovarian cancer , the presence of breast and ovarian cancer in the same woman , and Ashkenazi Jewish ancestry were all associated with an increased risk of detecting a BRCA1 mutation .
### Output Text:
Among family members , an average age of less than 55 years at the diagnosis of <span class="disease">breast cancer</span> , the presence of <span class="disease">ovarian cancer</span> , the presence of <span class="disease">breast and ovarian cancer</span> in the same woman , and Ashkenazi Jewish ancestry were all associated with an increased risk of detecting a BRCA1 mutation . 