Debulk: To surgically remove a portion of a tumor to help reduce the pain and symptoms due to the tumor or to improve the quality of life.

Diffuse: Not definitely limited or localized; widely distributed.

Disease Free Survival: Length of time after treatment during which no cancer is found. Can be reported for an individual patient or for a study population.

Disease Specific Interval: The percentage of subjects in a study who have survived a particular disease for a defined period of time. Usually reported as time since diagnosis or treatment. In calculating this percentage, only deaths from the disease being studied are counted. Subjects who died from some other cause are not included in the calculation.

Double Blinded Clinical Trial: A clinical trial in which neither the medical staff nor the person knows which of several possible therapies the person is receiving until the end of the study.

Dysphagia: Difficulty swallowing.

Dysuria: Difficulty or painful urination.
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