Submitted soft tissues and bony fragments show dense infiltration by neutrophils, lymphocytes, plasma cells and macrophages with related capillary proliferation. No evidence of specific granulomas. No evidence of malignancy.
Rt femur pathological fracture. X-ray show multiple medullary osteolytic lesions.
Soft tissue fragments collectively measured 4.5x3.5x1 cm, totally embedded.
Rt femur biopsy: