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: We report a novel missense change in BRCA1 , 2640 C - - > T ( R841W ) , found in 3 cases from a subject group of 305 breast and 79 ovarian cancer cases from Orange County , CA .
### Output Text:
We report a novel missense change in BRCA1 , 2640 C - - > T ( R841W ) , found in 3 cases from a subject group of 305 <span class="disease">breast and 79 ovarian cancer</span> cases from Orange County , CA . 