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: However , a probable germline mutation in a pancreatic tumour cell line suggests a role for BRCA2 in susceptibility to pancreatic cancer . .
### Output Text:
However , a probable germline mutation in a <span class="disease">pancreatic tumour</span> cell line suggests a role for BRCA2 in susceptibility to <span class="disease">pancreatic cancer</span> . . 