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: Mutation of the VHL gene is associated exclusively with the development of non - papillary renal cell carcinomas .
### Output Text:
Mutation of the VHL gene is associated exclusively with the development of <span class="disease">non - papillary renal cell carcinomas</span> . 