Musculoskeletal Radiology Practice Questions

Q: The image of X-ray spine shows?

Fish vertebra. ***Fish vertebra*** - The image shows **biconcave vertebral body deformities** (marked by the arrow), where both the superior and inferior endplates are collapsed centrally, resembling the shape of a fish vertebra. - This appearance is typically seen in conditions like **severe osteoporosis** or metabolic bone diseases (e.g., **osteomalacia**). *Osteoporotic spine* - While **osteoporosis can lead to fractures and vertebral body collapse**, "osteoporotic spine" is a broader diagnosis. - The specific pattern of **biconcave collapse** seen here is more precisely described as fish vertebra, often a consequence of severe osteoporosis. *Anterior beaking vertebra* - **Anterior beaking** refers to a localized projection or pointed anterior vertebral body, often seen in conditions like mucopolysaccharidoses or trauma. - This is distinct from the **central biconcave collapse** visible in the provided image. *Vertebra plana* - **Vertebra plana** describes a vertebral body that has **uniformly collapsed in height**, making it very flat. - The image shows a **biconcave deformity** with central compression, not a uniform flattening of the entire vertebral body.

Q: Identify the defect shown in the X-ray skull:

Pepper pot skull. ***Pepper pot skull*** - The image exhibits a diffuse punctate or granular demineralization of the skull, resembling a "pepper pot." This appearance is characteristic of **hyperparathyroidism**, where excessive parathyroid hormone leads to increased osteoclastic activity and trabecular bone loss, leaving behind small, lucent areas. - This pattern results from widespread erosions of the **cortical bone** and trabeculae throughout the skull, creating a mottled, finely granular or punctate radiolucency. *Crew cut appearance* - A "crew cut" or "hair-on-end" appearance is typically seen in patients with severe, chronic **hemolytic anemias**, such as **thalassemia major** and **sickle cell anemia**. - It results from extreme marrow hyperplasia, causing expansion of the diploic space and thinning of the outer cortical bone, leading to spiculation perpendicular to the skull surface. *Punched out lytic lesions* - "Punched out lytic lesions" are well-demarcated, rounded radiolucencies without a sclerotic border, classically associated with **multiple myeloma**. - These lesions represent areas of osteolysis caused by plasma cell infiltration and are typically larger and more discrete than the fine granular appearance seen in a "pepper pot skull." *Widened sella turcica* - A widened sella turcica is usually indicative of an intrasellar mass, most commonly a **pituitary adenoma**, or can be due to hydrocephalus. - This finding focuses specifically on the sella region and does not describe the diffuse, granular demineralization seen throughout the entire skull vault in the image.

Q: The X-ray of the patient shows?

Scurvy. ***Scurvy*** - The X-ray images display classical findings of scurvy, including a **dense metaphyseal line** (white line of Frankel), **lucent zone beneath the metaphysis** (Trümmerfeld zone), and **epiphyseal separation** due to capillary fragility. - The findings are particularly evident at the distal ends of the femur and proximal tibia, consistent with **subperiosteal hemorrhages** and impaired osteoid formation characteristic of **vitamin C deficiency**. *Rickets* - Rickets is characterized by **widening, cupping, and fraying of the metaphyses**, often accompanied by **growth plate widening** and bowing of long bones due to defective mineralization of bone matrix. - These features are not the predominant findings in the provided X-rays, which show distinct abnormalities related to hemorrhage and bone fragility. *Hemarthrosis* - Hemarthrosis refers to bleeding into a joint space, often characterized by **joint effusions** and possibly **bone erosions** if chronic, typically seen in conditions like hemophilia. - While subperiosteal hemorrhages are present in scurvy, the X-ray findings are broader than just intra-articular bleeding and include specific metaphyseal changes. *Sun burst appearance* - A "sunburst appearance" is a classic radiographic finding often associated with aggressive **bone tumors** like **osteosarcoma**, indicating **spiculated periosteal reaction** extending perpendicularly from the bone cortex. - This pattern is absent in the provided X-rays, which show signs of metabolic bone disease rather than a primary bone tumor.

Q: The following Skull X-ray is seen in:

Thalassemia. ***Thalassemia*** - The image shows a classic **hair-on-end appearance** of the skull, which is a characteristic radiological finding in severe forms of thalassemia. - This appearance results from **marrow hyperplasia** in response to chronic hemolysis, leading to widening of the diploic space and expansion of bone marrow at the expense of outer cortical bone. *Multiple myeloma* - Multiple myeloma typically presents with multiple well-demarcated, **punched-out lytic lesions** in the skull, without a "hair-on-end" pattern. - The bone lesions are due to plasma cell infiltration and osteoclast activation, leading to discrete areas of bone destruction. *Histiocytosis-X* - Histiocytosis-X, also known as Langerhans cell histiocytosis, can cause **lytic bone lesions** in the skull, often referred to as "geographic" or "punched-out" lesions. - While it can cause diffuse bone involvement, it does not typically produce the organized trabecular pattern characteristic of "hair-on-end." *Paget's disease* - Paget's disease of bone often manifests as areas of **bone enlargement**, cortical thickening, and a mixture of lytic and sclerotic changes, sometimes described as a **cotton-wool appearance** in the skull. - It does not present with the "hair-on-end" pattern, which is primarily associated with conditions causing chronic marrow expansion.

Q: A child presents with severe microcytic anemia, hepatosplenomegaly, and elevated HbF on hemoglobin electrophoresis. The following X-ray skull shows:

Thalassemia. ***Thalassemia*** - The X-ray shows changes consistent with **marrow expansion from erythroid hyperplasia** in the skull, a classical finding in severe **thalassemia**. - This typically manifests as a **'hair-on-end' appearance** due to widening of the diploic space and thinning of the outer table of the skull from expanded bone marrow. - This is most commonly seen in **beta-thalassemia major** due to chronic severe anemia and compensatory marrow expansion. *Rickets* - Rickets primarily affects **growing bones** and presents with widened growth plates, bowing of long bones, and changes in the rib cage (rachitic rosary). - While it can affect skull ossification (craniotabes, frontal bossing), it does not typically show the **'hair-on-end' appearance** seen in this image. - Skull changes in rickets show delayed ossification rather than marrow hyperplasia. *Sickle cell disease* - While sickle cell disease can also cause **'hair-on-end' appearance** due to marrow hyperplasia, it is **less common and less pronounced** than in thalassemia. - Sickle cell predominantly affects African populations, whereas thalassemia is more common in Mediterranean, Middle Eastern, and Asian populations. - Crucially, the clinical picture here — severe microcytic anemia with elevated HbF on hemoglobin electrophoresis — is characteristic of **beta-thalassemia major**, not sickle cell disease (which shows HbS on electrophoresis and normocytic/mildly microcytic indices). *Iron deficiency anemia* - Iron deficiency anemia, even when severe and chronic, does **not typically cause** the 'hair-on-end' appearance. - Skull changes in iron deficiency are minimal as the marrow hyperplasia is not as marked as in hemolytic anemias. - Iron deficiency causes **microcytic hypochromic anemia** without the massive compensatory erythropoiesis seen in thalassemia.

Q: Comment on the diagnosis based on X-ray spine findings:

Mucopolysaccharidosis. **_Mucopolysaccharidosis_** - The imaging features, particularly the **beaked vertebrae** and **widespread bone changes** (dysostosis multiplex), are characteristic of mucopolysaccharidosis. - The vertebral bodies show **anterior inferior beaking**, especially in the lumbar spine, which is a hallmark finding. - This is a storage disorder affecting glycosaminoglycan metabolism, leading to skeletal dysplasia. *Osteopetrosis* - Osteopetrosis is characterized by **increased bone density** ("marble bones") due to defective osteoclast function. - The X-ray does not show diffusely increased bone density; instead, it demonstrates abnormal vertebral shape with anterior beaking. *Spondylolisthesis* - Spondylolisthesis involves the **forward displacement of one vertebra over another**, typically due to a defect in the pars interarticularis or degenerative changes. - This condition presents with vertebral slippage, which is not evident in the provided X-rays. *Sickle cell anaemia* - Sickle cell anaemia can cause bony changes such as **H-shaped vertebrae** due to bone infarcts and avascular necrosis. - The appearance of the vertebrae with anterior beaking is not typical for sickle cell disease.

Q: Comment on the diagnosis based on the skull and vertebral changes shown in the radiological image below:

Thalassemia. ***Thalassemia*** - The skull X-ray shows prominent **"hair-on-end" appearance** due to widening of the diploic space and thinning of the outer table, characteristic of chronic erythroid hyperplasia in thalassemia. - The vertebral bodies show a **"fishmouth" or "codfish" deformity**, a sign of severe osteopenia and bone marrow expansion commonly seen in thalassemia. *Rickets* - Rickets primarily affects the **growth plates** in children, leading to wide, irregular growth plates, cupping, and fraying of metaphyses, which are not seen here. - While it causes bone softening, the specific cranial and vertebral changes observed, like **"hair-on-end"** or "fishmouth" vertebrae, are not typical of rickets. *Osteopetrosis* - Osteopetrosis is characterized by **increased bone density** (sclerotic bones) due to defective osteoclast function, leading to abnormally thick and dense bones. - The radiographs show **osteopenia** and bone marrow expansion, which is the opposite of what is seen in osteopetrosis. *Hyperparathyroidism* - Hyperparathyroidism typically causes **subperiosteal bone resorption**, especially in the phalanges, and sometimes **brown tumors**. - While it can lead to generalized osteopenia, the specific "hair-on-end" skull and "fishmouth" vertebrae are not hallmark features; **salt-and-pepper skull** may be present, which differs from the findings here.

Q: A 28-year-old female with chronic kidney disease presents with bone pain and elevated parathyroid hormone levels. She has a history of renal stones. What is the sign visible in the image?

Rugger-jersey spine. ***Rugger-jersey spine*** - The image exhibits alternating bands of dense and lucent bone in the vertebral bodies, which is characteristic of the **rugger-jersey spine** sign. - This sign is classically seen in **renal osteodystrophy due to secondary hyperparathyroidism**, which occurs in chronic kidney disease. - In secondary hyperparathyroidism, the dense bands represent increased osteosclerosis at the vertebral endplates, while the central lucent areas reflect increased bone resorption. *Trummerfeld zones* - These are zones of **reduced mineralization** in the metaphyses of long bones, typically seen in **rickets** or **scurvy**. - They are not associated with the vertebral changes seen in the image or the clinical scenario of chronic kidney disease with secondary hyperparathyroidism. *Vertebra plana* - Refers to a vertebra that has **collapsed** to a flat, disc-like shape, often maintaining its cortical margins. - It is typically caused by conditions like **eosinophilic granuloma**, metastatic disease, or severe osteoporosis, none of which fit the radiographic appearance of rugger-jersey spine. *Looser zones* - These are also known as **pseudofractures** and are radiolucent lines that represent uncalcified osteoid, characteristic of **osteomalacia**. - They are typically seen in specific locations like the femoral neck, pubic rami, and scapula, not in the vertebral bodies as shown in the image.

Q: What does the following radiograph show?

Scurvy. ***Scurvy*** - The radiograph shows a **dense provisional zone of calcification (white line of Frankel)**, **rarefaction of the metaphysis (Trummerfeld zone)**, and **epiphyseal separation**, which are classic signs of scurvy. - Scurvy results from **vitamin C deficiency**, impairing collagen synthesis crucial for bone matrix formation. *Rickets* - Rickets typically presents with **widened, cupped, and frayed metaphyses** due to impaired mineralization of cartilage in the growth plates. - This image does not show the characteristic widening and fraying of the growth plates seen in rickets. *Osteoid osteoma* - An osteoid osteoma is a **benign bone tumor** characterized by a small radiolucent **nidus** surrounded by dense sclerotic bone. - The findings in the radiograph (metaphyseal changes, epiphyseal separation) are not consistent with osteoid osteoma. *Haemophilia* - Hemophilia causes **recurrent hemarthrosis (bleeding into joints)**, leading to joint destruction, synovial hypertrophy, and subchondral bone cysts. - While it can affect bone health, the specific changes seen in this radiograph (e.g., dense provisional zone of calcification) are not typical of hemophilia.

Question 1

The image of X-ray spine shows?

Accepted Answer

Fish vertebra

Answer

Osteoporotic spine

Answer

Anterior beaking vertebra

Answer

Vertebra plana

Question 2

Identify the defect shown in the X-ray skull:

Accepted Answer

Pepper pot skull

Answer

Crew cut appearance

Answer

Punched out lytic lesions

Answer

Widened sella turcica

Question 3

The X-ray of the patient shows?

Accepted Answer

Scurvy

Answer

Rickets

Answer

Hemarthrosis

Answer

Sun burst appearance

Question 4

The following Skull X-ray is seen in:

Accepted Answer

Thalassemia

Answer

Multiple myeloma

Answer

Histiocytosis-X

Answer

Paget's disease

Question 5

A child presents with severe microcytic anemia, hepatosplenomegaly, and elevated HbF on hemoglobin electrophoresis. The following X-ray skull shows:

Accepted Answer

Thalassemia

Answer

Rickets

Answer

Sickle cell disease

Answer

Iron deficiency anemia

Question 6

Comment on the diagnosis based on X-ray spine findings:

Accepted Answer

Mucopolysaccharidosis

Answer

Osteopetrosis

Answer

Spondylolisthesis

Answer

Sickle cell anaemia

Question 7

Comment on the diagnosis based on the skull and vertebral changes shown in the radiological image below:

Accepted Answer

Thalassemia

Answer

Rickets

Answer

Osteopetrosis

Answer

Hyperparathyroidism

Question 8

A 28-year-old female with chronic kidney disease presents with bone pain and elevated parathyroid hormone levels. She has a history of renal stones. What is the sign visible in the image?

Accepted Answer

Rugger-jersey spine

Answer

Trummerfeld zones

Answer

Vertebra plana

Answer

Looser zones

Question 9

What does the following radiograph show?

Accepted Answer

Scurvy

Answer

Rickets

Answer

Osteoid osteoma

Answer

Haemophilia

Question 10

The X-ray and MRI findings given below point to the diagnosis of: (Recent NEET Pattern 2016-17)

Accepted Answer

Osteosarcoma

Answer

Osteoid osteoma

Answer

Osteoclastoma

Answer

Pigmented villonodular synovitis

Musculoskeletal Radiology — MCQs

Musculoskeletal Radiology — MCQs

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