Ramesh 60 years, presents with generalized bone pain. On examination there is elevated ESR of 100 mm, serum globulin 7, lytic lesions in the skull, serum creatinine of 3.5 mg/dL and serum calcium of 11mg/dL. What is the most likely diagnosis -
Waldenstrom's macroglobulinemia
Multiple myeloma
Hyperparathyroidism
Osteomalacia