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 structural consequences of the identified mutation , resulting in the CyS2010 - > Arg substitution , were evaluated by expression of the vWF carboxyl - terminal domain containing residues 1366 - 2050 .
### Output Text:
The structural consequences of the identified mutation , resulting in the CyS2010 - > Arg substitution , were evaluated by expression of the vWF carboxyl - terminal domain containing residues 1366 - 2050 . 