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: Fluorescence in situ hybridisation ( FISH ) studies with distal 11p13 specific cosmids showed that the chromosome 11 breakpoint lay between the aniridia ( PAX6 ) locus and a region approximately 100 kb distal to PAX6 defined by the cosmid FO2121 .
### Output Text:
Fluorescence in situ hybridisation ( FISH ) studies with distal 11p13 specific cosmids showed that the chromosome 11 breakpoint lay between the <span class="disease">aniridia</span> ( PAX6 ) locus and a region approximately 100 kb distal to PAX6 defined by the cosmid FO2121 . 