In a patient with anemia, hypercalcemia, and renal dysfunction, which condition should be considered?

• A. Multiple Myeloma
• B. Chronic Lymphocytic Leukemia
• C. Aplastic Anemia
• D. Iron Deficiency Anemia

Answer: (A)

In a patient presenting with anemia, hypercalcemia, and renal dysfunction, multiple myeloma should be considered as it is known to cause a triad of symptoms and signs often referred to as "CRAB" – this stands for Calcium levels elevated (hypercalcemia), Renal failure, Anemia, and Bone lesions.

Multiple myeloma is a malignancy of plasma cells in the bone marrow. The increased levels of calcium are typically due to bone resorption as myeloma cells produce osteoclast-activating factors that lead to bone destruction. This process contributes to the patient's hypercalcemia. Additionally, the proliferation of malignant plasma cells can lead to renal impairment due to various factors, including the deposition of light chains (Bence Jones proteins) in the renal tubules, leading to a condition known as myeloma kidney or cast nephropathy.

The combination of these symptoms—anemia resulting from bone marrow infiltration, renal dysfunction due to damage from either the myeloma itself or its metabolic consequences, and hypercalcemia from osteolytic activity—strongly points towards multiple myeloma as the underlying condition.

In contrast, conditions like chronic lymphocytic leukemia, aplastic anemia, and iron deficiency anemia