Multiple Myeloma and Paraproteinaemias

This topic provides an in-depth study of plasma cell dyscrasias, with a primary focus on Multiple Myeloma (MM) and related conditions. It is essential for Zambian university and college students in clinical pathology and haematology. The topic begins by defining paraproteinaemia as the presence of a monoclonal immunoglobulin band. It then details Multiple Myeloma as a neoplastic proliferation of plasma cells in the bone marrow, associated with a serum/urine paraprotein and end-organ damage (CRAB criteria: HyperCalcaemia, Renal impairment, Anaemia, Bone lesions). Pathogenesis, including complex genetic changes and interactions with bone marrow stroma, is explained. Diagnostic criteria, laboratory findings (e.g., paraprotein electrophoresis, elevated free light chains, immunoparesis, rouleaux formation), and clinical complications (bone pain, infections, renal failure) are thoroughly covered. The topic also distinguishes symptomatic myeloma from its precursor states: Monoclonal Gammopathy of Undetermined Significance (MGUS) and Smouldering Myeloma. For tertiary learners, understanding the spectrum of paraproteinaemias, the diagnostic workup for myeloma, and the interpretation of relevant lab tests is critical. This knowledge is directly applicable to patient management and is a frequent subject of examination in haematology and clinical chemistry for students across Zambia's tertiary education institutions.