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 major cause of death of mutant mice was rupture of the major blood vessels , similar to patients with type IV Ehlers - Danlos syndrome .
### Output Text:
The major cause of death of mutant mice was rupture of the major blood vessels , similar to patients with <span class="disease">type IV Ehlers - Danlos syndrome</span> . 