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: Microcell hybrids containing only the region 10pter - q11 were suppressed for tumorigenicity following injection of microcell hybrids into nude mice .
### Output Text:
Microcell hybrids containing only the region 10pter - q11 were suppressed for tumorigenicity following injection of microcell hybrids into nude mice . 