INS and cancer: Various factors can induce electrolyte dysregulation43 including cancer (eg, brain metastasis, adrenal metastasis, and kidney metastasis), cancer treatment (eg, chemotherapeutic agents, target therapies, and immunotherapies), concomitant drugs (eg, thiazide diuretics, insulin, granulocyte growth factors, beta‐2 agonists, and glucocorticoids), and concomitant diseases (eg, heart failure, kidney failure, thyroiditis, hypercortisolism, liver cirrhosis, pneumonia, and inflammatory lung or brain diseases).