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[Osteomedullary amyloidosis with osteolytic lesions. Apropos of 4 cases]
Abstract:
Amyloidosis of bone and bone marrow is rarely symptomatic and is generally limited to deposits diagnosed by histological examination. Four cases with lytic bone lesions are reported. In 2 cases, amyloidosis was associated with Waldenstroem's Macroglobulinemia, in one case with multiple myeloma and in 1 case with solitary plasmocytoma. These 4 cases are compared to 14 cases already published in the literature, including 2 cases of plasmocytic dyscrasias. The role of amyloidosis in the genesis of bone lesions is discussed.
Insights
Amyloidosis of bone and bone marrow rarely causes symptoms, typically found via histology. This study reports four cases with lytic bone lesions, often linked to plasma cell disorders.
Area of Science:
- Hematology
- Oncology
- Pathology
Background:
- Amyloidosis, characterized by protein deposits, typically affects organs but can involve bone and bone marrow.
- Bone and bone marrow amyloidosis is often asymptomatic and diagnosed histologically.
- Lytic bone lesions in amyloidosis are uncommon and warrant further investigation.
Observation:
- Four new cases of amyloidosis presenting with lytic bone lesions are described.
- Amyloidosis was associated with Waldenstrom's Macroglobulinemia in two cases.
- One case each of amyloidosis with multiple myeloma and solitary plasmacytoma was observed.
Findings:
- The study analyzes these four cases alongside fourteen previously reported cases.
- Plasmacytic dyscrasias were present in two of the previously reported cases.
- The findings suggest a potential link between amyloidosis and the development of bone lesions in specific hematologic conditions.
Implications:
- Amyloidosis should be considered in the differential diagnosis of lytic bone lesions, especially in patients with plasma cell dyscrasias.
- Understanding the pathogenesis of bone involvement in amyloidosis is crucial for patient management.
- Further research is needed to elucidate the mechanisms underlying amyloid-induced bone lesions.