Hyperphosphatemia due to 'massive cellular lysis releasing intracellular phosphate' is most commonly associated with which treatment?

Hyperphosphatemia due to 'massive cellular lysis releasing intracellular phosphate' is most commonly associated with which treatment?

• A. Chemotherapy
• B. Renal failure
• C. Acute pancreatitis
• D. Rhabdomyolysis

Answer: (A)

Massive cellular lysis releases intracellular phosphate into the bloodstream, so a spike in phosphate is a hallmark of tumor lysis syndrome. This pattern most clearly appears after starting cytotoxic chemotherapy in cancers with a high tumor burden and rapid cell turnover, when many malignant cells are destroyed at once. As those cells break apart, phosphate floods the circulation and binds calcium, often leading to secondary hypocalcemia and potential kidney injury from uric acid as well. Chemotherapy is thus the treatment scenario most commonly linked to this hyperphosphatemia pattern.

Massive cellular lysis releases intracellular phosphate into the bloodstream, so a spike in phosphate is a hallmark of tumor lysis syndrome. This pattern most clearly appears after starting cytotoxic chemotherapy in cancers with a high tumor burden and rapid cell turnover, when many malignant cells are destroyed at once. As those cells break apart, phosphate floods the circulation and binds calcium, often leading to secondary hypocalcemia and potential kidney injury from uric acid as well. Chemotherapy is thus the treatment scenario most commonly linked to this hyperphosphatemia pattern.