Factors that may have influenced the single status of childhood cancer survivors included short stature, history of tumor recurrence, poor self-reported physical functioning, emotional distress, problems with task efficiency, problems with organization, and problems with memory, the study said.

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The label now includes a black box warning that it can increase the risk of death, MI, stroke, venous thromboembolism, thrombosis of vascular access, and tumor progression or recurrence.

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Vilanova underwent an operation to remove a tumor from his lung after suffering a recurrence of a problem on his parotid gland -- located at the back of his mouth.

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