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: This is the first report of a mutation at this residue in either sporadic tumours or in the germline and the first report of a germline mutation within the tetramerisation domain .
### Output Text:
This is the first report of a mutation at this residue in either <span class="disease">sporadic tumours</span> or in the germline and the first report of a germline mutation within the tetramerisation domain . 