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: In the second family , JT was found in three of the five affected individuals and two affected members also exhibited polycystic kidney disease .
### Output Text:
In the second family , <span class="disease">JT</span> was found in three of the five affected individuals and two affected members also exhibited <span class="disease">polycystic kidney disease</span> . 