Clinical correlates of bone marrow plasmacytosis

Area of Science:

• Hematology
• Internal Medicine
• Oncology

Background:

• Multiple myeloma presents with variable clinical features, including bone marrow plasmacytosis.
• Understanding the prevalence and causes of bone marrow plasmacytosis is crucial for accurate diagnosis.

Purpose of the Study:

• To determine the prevalence and clinical correlates of bone marrow plasmacytosis in anemic medical inpatients.
• To investigate potential associations between plasmacytosis and specific diseases or patient demographics.

Main Methods:

• Prospective study of 133 anemic medical inpatients.
• Assessment of bone marrow plasma cell percentage.
• Correlation analysis with clinical diagnoses, disease severity, and laboratory markers.

Main Results:

• 13% of patients had ≥5% marrow plasma cells; 3% had ≥10%.
• Lung infections (pneumonia, tuberculosis) were the primary cause (41%), correlating with disease severity.
• Multiple myeloma was diagnosed in only two patients.
• Serum hyperglobulinemia and advancing age showed correlations with plasmacytosis.

Conclusions:

• Bone marrow plasmacytosis in anemic inpatients is often linked to infections, particularly pulmonary, rather than malignancy.
• While age and hyperglobulinemia are associated, some elderly patients exhibit unexplained plasmacytosis.
• These findings aid in differentiating reactive plasmacytosis from multiple myeloma.