**Question:** All of the following features are true regarding multiple myeloma except-

A. Multiple myeloma is a plasma cell disorder characterized by the clonal proliferation of malignant plasma cells in the bone marrow.
B. It presents with hypercalcemia, renal impairment, anemia, and bone lesions (CRAB features).
C. The primary treatment option is surgery to remove the affected bone.
D. The disease has a poor prognosis and is often fatal.

**Correct Answer:** C. The primary treatment option is surgery to remove the affected bone.

**Core Concept:** Multiple Myeloma is a plasma cell disorder characterized by the clonal proliferation of malignant plasma cells in the bone marrow. It is associated with specific clinical features like hypercalcemia, renal impairment, anemia, and bone lesions. These features are summarized by the acronym CRAB:

**Why the Correct Answer is Right:**
Multiple myeloma is a plasma cell disorder, not a surgical condition. Surgery is primarily used to manage complications, such as spinal cord compression or pathologic fractures, but is not the primary treatment option. The primary treatments for multiple myeloma include chemotherapy, radiotherapy, and bone marrow transplantation.

**Why Each Wrong Option is Incorrect:**
A. This option is correct as multiple myeloma is indeed a plasma cell disorder.
B. The correct acronym is CRAB (Hypercalcemia, Renal Impairment, Anemia, and Bone Lesions), not CRABT. Chemotherapy, radiotherapy, and bone marrow transplantation are the primary treatments for multiple myeloma, addressing these CRAB features.
C. Surgery is not the primary treatment for multiple myeloma; chemotherapy, radiotherapy, and bone marrow transplantation are the primary treatments for this disorder.
D. Multiple myeloma has a poor prognosis and can be fatal in some cases, but this option does not specifically address the incorrect treatment approach mentioned in option C.

**Clinical Pearl:**
Understanding the correct treatments for multiple myeloma is essential for medical students and healthcare professionals alike. Knowledge of the primary treatments, including chemotherapy, radiotherapy, and bone marrow transplantation, will help guide patient management and improve outcomes. Surgery should be reserved for managing complications such as spinal cord compression or pathologic fractures.