Hyponatremia in Oncology Patients.

Hyponatremia is frequent in cancer patients and potentially deleterious. Cancer patients have specific requirements due to the nature and treatment of their disease, which can directly impact the occurrence and severity of hyponatremia, and limit treatment choices. Although essential for successful hyponatremia management, appropriate diagnostic testing is not routinely performed in the current practice. Despite clear evidence that hyponatremia is associated with poor outcome in oncology patients, most patients are still hyponatremic while under observation. Guidance on specific treatment of cancer patients with hyponatremia is needed to optimize patient care in the face of these challenges.