You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
In this task, you will be given a sentence. You need to reconize the name of the disorder or disease. Disease is a disorder of structure or function in a human, animal, or plant, especially one that produces specific symptoms or that affects a specific location and is not simply a direct result of physical injury. Although there might be several correct answers, you need to write one of them.

I had been suffering from cardiovascular disorder.
Solution: cardiovascular disorder
Why? Here, the person mentions this disorder which is related to heart issues.

New input:  The mutation is in an area of the gene that encodes the protein - binding region known as the pocket region and has been detected in other cases of retinoblastoma . .
Solution:
retinoblastoma