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: Fusion genes resulting from alternative chromosomal translocations are overexpressed by gene - specific mechanisms in alveolar rhabdomyosarcoma .
### Output Text:
Fusion genes resulting from alternative chromosomal translocations are overexpressed by gene - specific mechanisms in <span class="disease">alveolar rhabdomyosarcoma</span> . 