Calcineurin Inhibitor-Free GVHD Prevention Regimen After Related Haplo PBSCT

Myeloablative conditioning: 40 mg/m\^2 daily for 4 days. Dose will be adjusted for estimated creatinine clearance. Reduced intensity conditioning: 30 mg/m\^2 daily on days -6, -5, -4, -3 and -2. Dose will be adjusted for estimated creatinine clearance.

Myeloablative conditioning: IV dosing targeted for a daily total area under curve (AUC) 5300 mmol\*min/L for 4 days. Busulfan AUC will be pharmacokinetically targeted. An AUC 3500 mmol\*min/l may be considered in patients over 60 years of age or with multiple comorbidities. Chemotherapy may start on day -6 or day -5 depending on the day of admission (-6 for Wednesday admission, -5 for Sunday admission).

Reduced intensity conditioning: 14.5 mg/kg/day on days -6, -5. GVHD prophylaxis: 50 mg/kg ideal body weight (IBW) daily dose will be given on days +3 and +4 post-transplant as an IV infusion over 1-2 hours.

Reduced intensity conditioning: 200 centigray (cGy) on day -1.

On day 0, patients will receive a peripheral blood hematopoietic cell graft.

GVHD prophylaxis: SIR will be administered as a 9 mg oral loading dose on day +5, followed by maintenance. SIR levels will be monitored and maintenance dosing adjusted as needed for a target trough level 8 to 14 ng/ml, per Moffitt BMT program standard practice. In the absence of acute GVHD, sirolimus taper will start on day +90 (+/- 10 days) and it is suggested to finish by day +180.

GVHD prophylaxis: MMF will start on day +5 at a dose of 15 mg/kg every 8 hours IV with the maximum daily dose not to exceed 3 gm. MMF will be changed to orally (PO) and discontinued on day +35 (without taper) in the absence of acute GVHD.

Growth factor support: G-CSF will be given beginning on day 5 at a dose of 5 mcg/kg/day (rounding to the nearest vial dose), until absolute granulocyte count (ANC) is \> 1,000/mm\^3 for three consecutive days. G-CSF may be given IV or subcutaneously.