Validation of Insulin Protocol for Glucocorticoid-induced Hyperglycemia in Diabetic Oncology Patients

For diabetics enrolled on admission: Inclusion Criteria: * Age ≥ 18 years old * Type 2 diabetes mellitus treated with insulin secretagogues or insulin prior to hospitalization * Diagnosis of lymphoma * Plan to treat with steroids of minimum equivalent of 20 mg prednisone per day * Hospitalized for at least 48 hours * Decision-making capacity to provide own consent Exclusion Criteria: * Type 1 diabetes * Any contraindication to insulin therapy * Patients only on single agent therapy such as metformin, thiazolidinediones (TZDs), Dipeptidyl peptidase-4 (DPP4) inhibitors, or Exenatide®, for safety concerns * Insulin requirement of \>1.5 units of insulin/kg * If a patient required ICU stay during the hospitalization, data from 12 hours before, during, and 12 hours after ICU stay will be omitted to avoid confounding of the effect of critical illness on glycemic control * Pregnancy, confirmed with a urine b-human chorionic gonadotropin (HCG) (for all women between the age of 18 and 60 years old) Patients who develop a blood glucose \> 235 mg/dL after admission will be eligible for study enrollment based on the following: Inclusion criteria: * Age ≥ 18 years old * Diagnosis of lymphoma * Plan to treat with steroids of minimum equivalent of 20 mg prednisone per day * Will be hospitalized for at least an additional 48 hours * Decision-making capacity to provide own consent Exclusion criteria: * Any contraindication to insulin therapy * If a patient required ICU stay during the hospitalization, data from 12 hours before, during, and 12 hours after ICU stay will be omitted to avoid confounding of the effect of critical illness on glycemic control * Pregnancy, confirmed with a urine b-HCG (for all women between the age of 18 and 60 years old)