Musculoskeletal Oncology Indian Medical PG Practice Questions and MCQs
Practice Indian Medical PG questions for Musculoskeletal Oncology. These multiple choice questions (MCQs) cover important concepts and help you prepare for your exams.
Musculoskeletal Oncology Indian Medical PG Question 1: Which of the following stages of Breast Cancer corresponds to the following features: a breast mass of 6 x 3 cm, ipsilateral supraclavicular lymph node involvement, and distant metastasis that cannot be assessed?
- A. T4 N3 MX
- B. T4 N1 M1
- C. T4 N0 M0
- D. T3 N3c MX (Correct Answer)
Musculoskeletal Oncology Explanation: ***T3 N3c MX***
- A **breast mass of 6 x 3 cm** indicates a T3 tumor (tumor size > 5 cm).
- **Ipsilateral supraclavicular lymph node involvement** is classified as N3c disease. **Distant metastasis that cannot be assessed** is denoted by MX.
*T4 N3 MX*
- A **T4 classification** is reserved for tumors with direct extension to the chest wall or skin, or inflammatory breast cancer, which is not mentioned here.
- While N3c and MX are correct for the nodal and metastatic status, the T stage is inaccurate based on the provided tumor size.
*T4 N1 M1*
- A **T4 classification** is incorrect as the mass size alone (6 x 3 cm) does not meet T4 criteria.
- **N1** denotes involvement of 1-3 axillary lymph nodes, which is less extensive than supraclavicular involvement (N3c). **M1** indicates confirmed distant metastasis, but the question states it "cannot be assessed" (MX).
*T4 N0 M0*
- **T4** is incorrect, as this stage is for direct chest wall/skin involvement or inflammatory breast cancer.
- **N0** signifies no regional lymph node metastasis, contradicting the presence of supraclavicular lymph node involvement. **M0** indicates no distant metastasis, whereas the question specifies it cannot be assessed (MX).
Musculoskeletal Oncology Indian Medical PG Question 2: What is the most appropriate treatment for a soap bubble appearance at the lower end of the radius?
- A. Local excision
- B. Excision and bone grafting (Correct Answer)
- C. Amputation
- D. Radiotherapy
Musculoskeletal Oncology Explanation: ***Excision and bone grafting***
- A **soap bubble appearance** at the lower end of the radius is highly suggestive of a **giant cell tumor (GCT)**, which is locally aggressive and has a high recurrence rate after simple curettage.
- **Excision of the tumor and filling the defect with bone graft** is the preferred treatment to reduce recurrence and maintain skeletal integrity.
*Local excision*
- While local excision might remove the visible tumor, **GCTs are known to recur frequently** (up to 50%) after intralesional treatments like simple curettage.
- It does not adequately address microscopic extensions or the risk of **local aggressive behavior**.
*Amputation*
- **Amputation is an overly aggressive and unnecessary treatment** for a GCT, as it is a benign but locally aggressive tumor.
- It would be considered only in rare cases of extensive soft tissue invasion or intractable recurrence, which is not implied by a "soap bubble appearance."
*Radiotherapy*
- **Radiotherapy is generally not the first-line treatment for GCTs** due to concerns about **malignant transformation** (osteosarcoma) in a small percentage of cases, especially with high doses.
- It may be considered for unresectable tumors or recurrent lesions in difficult anatomical locations, or as an adjuvant.
Musculoskeletal Oncology Indian Medical PG Question 3: In the context of bone metastasis, which of the following bones is least likely to be a site of metastasis?
- A. Femur
- B. Humerus
- C. Fibula (Correct Answer)
- D. Spine
Musculoskeletal Oncology Explanation: ***Fibula***
- The **fibula** is not commonly involved in **metastatic disease**, primarily due to its low blood supply compared to other bones.
- While it can occasionally show metastatic lesions, it's **rare** when compared to more commonly affected sites.
*Humerus*
- The **humerus** can be affected by metastasis, often from lung or breast cancers [1], as it is one of the long bones involved in **hematogenous spread**.
- Common presentations include **lytic or blastic lesions**, which indicate bone damage from metastatic processes.
*Femur*
- The **femur** is frequently involved in metastatic lesions, particularly in patients with malignancies like **prostate or breast cancer** [1].
- Symptoms may include **pain** and **pathologic fractures** due to the weakening of the bone structure from metastasis [1].
*Spine*
- The **spine** is a common site for metastases, especially from cancers such as **lung, breast, and prostate** [1].
- Bone scans often reveal **vertebral body lesions**, leading to complications like **spinal cord compression** [1].
**References:**
[1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Osteoarticular And Connective Tissue Disease, pp. 674-675.
Musculoskeletal Oncology Indian Medical PG Question 4: What is the name of the nerve block technique shown in the image?
- A. Intra-arterial anesthesia (Correct Answer)
- B. Bier's block
- C. Regional anesthesia
- D. Axillary block
Musculoskeletal Oncology Explanation: ***Intra-arterial anesthesia***
- The image shows a **cannula inserted directly into an artery**, indicated by the blood reflux and the context of anesthesia, suggesting direct drug delivery into the arterial system.
- This method is used for specific types of regional pain management or diagnostic procedures where direct arterial access is required for **localized drug distribution**.
*Bier's block*
- A Bier's block, or **intravenous regional anesthesia**, involves injecting local anesthetic into a **vein** in an extremity after it has been exsanguinated and isolated by a tourniquet.
- The image clearly shows a **bright red blood flash**, characteristic of arterial cannulation, not venous.
*Regional anesthesia*
- This is a broad term referring to the **anesthesia of a specific region** of the body and encompasses various techniques.
- While intra-arterial anesthesia is a type of regional anesthesia, "regional anesthesia" itself is too general to specifically describe the technique shown.
*Axillary block*
- An **axillary block** is a type of peripheral nerve block targeting the brachial plexus in the axilla to anesthetize the arm.
- The image does not depict the axillary region or the characteristic needle placement for an axillary block; instead, it shows direct vascular access.
Musculoskeletal Oncology Indian Medical PG Question 5: Which bone tumor involves the epiphysis?
- A. Osteosarcoma
- B. Giant cell tumor (Correct Answer)
- C. Ewing's sarcoma
- D. Multiple myeloma
Musculoskeletal Oncology Explanation: ***Giant cell tumor***
- **Giant cell tumor (GCT)**, also known as osteoclastoma, characteristically arises in the **epiphysis** [1] or **metaphysis** of long bones in adults.
- It is a benign but locally aggressive tumor that often presents with pain, swelling, and reduced range of motion in the affected joint [1].
*Osteosarcoma*
- **Osteosarcoma** typically arises in the **metaphysis** of long bones, particularly around the knee (distal femur, proximal tibia).
- It is a highly malignant primary bone tumor characterized by the production of **osteoid** by tumor cells [2].
*Ewing's sarcoma*
- **Ewing's sarcoma** most commonly affects the **diaphysis** of long bones or flat bones (e.g., pelvis, scapula, ribs).
- It is characterized by small, round, blue cells and often presents with pain, swelling, and systemic symptoms like fever.
*Multiple myeloma*
- **Multiple myeloma** is a malignancy of **plasma cells** that primarily affects the **bone marrow** and can cause widespread osteolytic lesions.
- It typically presents in older adults and affects bones with active marrow, such as the vertebrae, ribs, skull, and pelvis, rather than being localized to the epiphysis as a primary bone tumor.
**References:**
[1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Bones, Joints, and Soft Tissue Tumors, pp. 1205-1206.
[2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Osteoarticular And Connective Tissue Disease, pp. 673-674.
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