Which of the following may be seen in Multiple Myeloma:
**Core Concept**
Multiple Myeloma is a type of blood cancer characterized by the proliferation of malignant plasma cells in the bone marrow, leading to an overproduction of monoclonal immunoglobulins (M-protein). This condition disrupts normal bone marrow function, leading to anemia, bone pain, and increased risk of infections.
**Why the Correct Answer is Right**
The correct answer is associated with the pathophysiology of Multiple Myeloma, where the overproduction of M-protein leads to hypercalcemia due to bone resorption. This is mediated by the release of parathyroid hormone-related protein (PTHrP) from the malignant plasma cells, which stimulates osteoclast activity and bone resorption.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it is more commonly associated with Lymphoma or Leukemia, which are different types of blood cancers.
**Option B:** This option is incorrect as it is more commonly associated with conditions such as Hyperthyroidism or Pheochromocytoma, which are not directly related to Multiple Myeloma.
**Option C:** This option is incorrect as it is more commonly associated with conditions such as Hyperparathyroidism or Paget's disease, which are not directly related to Multiple Myeloma.
**Clinical Pearl / High-Yield Fact**
In Multiple Myeloma, the presence of a monoclonal spike on serum protein electrophoresis (SPEP) is a diagnostic hallmark, indicating the overproduction of M-protein. This can be used to monitor disease response to treatment and detect relapse.
**Correct Answer:** D. Hypercalcemia