A 72-Year-Old Man With Heavily Pretreated, Relapsed/Refractory Multiple Myeloma

A 72-Year-Old Man with Heavily Pretreated, R/R Multiple Myeloma

Initial Presentation

• A 72-year-old man diagnosed with multiple myeloma 4.5 years ago returns for routine follow up
• Treatment history:
  • Initially treated with VRd for 12 months, followed by lenalidomide maintenance 15 mg daily; stable disease lasting 36 months
  • Rechallenged with VRd, stable disease lasting 20 months
  • Subsequently switched to KPd, achieved a partial response lasting 15 months
  • Started DVd; follow up at 12 months showed M protein increase by 0.5 g/dl; patient continues to feel well 
• Currently, 3 months after his last visit, he returns to the clinic complaining of increased muscle weakness, fatigue and bone pain
• PE: new bony tenderness appreciated on ribs, bruising, mild bleeding of the gums

Clinical Workup

• Labs: Hb 8.8 g/dL, calcium 10.2 mg/dL, LDH 160 U/L, creatinine 2.1 mg/dL, albumin 3.0 g/dL, b2 microgloblulin 4.9 mcg/mL, serum M-protein 4.2 g/dL, lambda free light chains 4.1 mg/dL
• HBV negative
• Skeletal survey and MRI revealed stable lytic bone lesions in the left hip, pelvis and L2 vertebrae and new lytic lesions on the ribs 4 and 10 on the left side
• Bone marrow shows 70% plasma cells IgG k
• FISH: t(6;14) (p21;q32) at diagnosis; new del(17p)
• Diagnosis: R-ISS stage II MM
• ECOG 1

Treatment

• Initiated treatment with belantamab mafodotin