Tumor Lysis Syndrome Complications

Clinical Presentation and Diagnosis

The American Society of Clinical Oncology notes that hyperkalemia produces cardiac manifestations, including palpitations resulting from cardiac irregularities, arrhythmias, ventricular tachycardia, and potentially cardiac arrest, in patients with Tumor Lysis Syndrome (TLS) 1, 2
Hyperkalemia causes neuromuscular effects, including muscle aches, cramps, and paresthesias, due to elevated potassium levels in TLS patients 1, 3
Gastrointestinal symptoms, such as nausea and vomiting, are common clinical manifestations of TLS-related hyperkalemia 1
The European Hematology Association guidelines suggest that hypocalcemia typically causes tetany and seizures rather than the symptom pattern described, and asymptomatic hypocalcemia does not require treatment 1, 4

The American Society of Clinical Oncology recommends immediate ECG monitoring for cardiac arrhythmias in patients with hyperkalemia 4
For severe hyperkalemia, treatment includes rapid insulin plus glucose, calcium carbonate to stabilize myocardial membranes, and sodium bicarbonate to correct acidosis, as suggested by the European Hematology Association 4
For mild hyperkalemia, treatment includes hydration, loop diuretics, and sodium polystyrene, according to the European Hematology Association guidelines 4
The American Society of Clinical Oncology notes that the combination of palpitations and muscle aches with gastrointestinal symptoms in a TLS patient demands immediate assessment and treatment of hyperkalemia before it progresses to life-threatening arrhythmias or cardiac arrest 1, 2