Arthrology and Infections Practice Questions

Q: Garre's osteomyelitis: which of the following statements is false?

Moth eaten appearance in radiography. ***Moth eaten appearance in radiography*** - This statement is **false** because Garre's osteomyelitis (also known as chronic osteomyelitis with proliferative periostitis) characteristically shows periosteal new bone formation, often described as an **onion-skin appearance**, not a moth-eaten pattern. - A **moth-eaten appearance** on radiography is more indicative of aggressive bone destruction seen in conditions like Ewing sarcoma or more virulent forms of osteomyelitis, rather than the proliferative nature of Garre's. *Common in children and young adults* - Garre's osteomyelitis is indeed more commonly observed in **children and young adults**, particularly affecting the jaws (mandible). - This demographic is often exposed to the dental infections that predispose to this condition. *Occurs due to staphylococcus aureus* - **Staphylococcus aureus** is a common causative agent for osteomyelitis in general, including Garre's osteomyelitis, especially in cases where the infection originates from a dental source. - The bacterial infection leads to inflammation and subsequent periosteal reaction. *Prevalent in immune-competent patients* - Garre's osteomyelitis typically develops in **immune-competent individuals**, suggesting that the host immune response plays a role in the chronic, proliferative nature of the periosteal reaction. - Unlike some severe forms of osteomyelitis, it is not primarily associated with immunodeficiency.

Q: What is the condition commonly referred to as 'draughtsman's elbow'?

Olecranon bursitis. ***Olecranon bursitis*** - This condition is colloquially known as **"draughtsman's elbow"**, **"student's elbow"**, or **"baker's elbow"** due to its association with prolonged leaning on the elbow. - It involves inflammation and swelling of the **olecranon bursa**, which is located at the posterior aspect of the elbow. *Lateral epicondylitis* - This condition is commonly known as **"tennis elbow"** and involves inflammation of the **extensor tendons** originating from the lateral epicondyle. - It typically presents with pain on the **lateral aspect of the elbow**, worsened by gripping and wrist extension. *Medial epicondylitis* - This condition is commonly known as **"golfer's elbow"** and involves inflammation of the **flexor-pronator tendons** originating from the medial epicondyle. - It causes pain on the **medial aspect of the elbow**, worsened by activities involving wrist flexion and pronation. *Medial epicondyle avulsion fracture* - This is a traumatic injury where a fragment of the **medial epicondyle** is pulled away from the humerus, often seen in overhead throwing athletes. - It usually involves acute pain, swelling, and sometimes **nerve dysfunction**, which differs significantly from the inflammatory process of olecranon bursitis.

Q: What is the most effective management strategy for hemarthrosis?

Needle aspiration to remove excess blood. ***Needle aspiration to remove excess blood*** - **Aspirating the blood** from the joint effectively reduces intra-articular pressure, pain, and inflammation. - This procedure also helps prevent **synovial hypertrophy** and **cartilage damage** caused by the presence of blood in the joint. *Application of a compression bandage* - While helpful for reducing swelling and providing support, a **compression bandage alone** does not remove the accumulated blood. - It may alleviate some discomfort but does not address the underlying issue of **intra-articular blood accumulation**. *Immobilization with a P.O.P. cast* - **Immobilization** can help rest the joint and reduce pain, but it does not remove the blood from the joint space. - Prolonged immobilization can lead to **joint stiffness** and **muscle atrophy**, which are undesirable outcomes. *All of the options* - While compression and immobilization can be supportive measures, they are not the **most effective primary strategy** for managing hemarthrosis. - The direct removal of blood via **aspiration** is crucial for alleviating pressure and preventing long-term joint damage.

Q: Garre's osteomyelitis commonly involves

Jaw. ***Jaw*** - **Garre's osteomyelitis**, also known as **proliferative periostitis**, most commonly affects the **mandible (jawbone)** in children and young adults. - It arises as a **periosteal reaction** to a low-grade chronic infection, typically originating from an odontogenic source. *Femur* - While osteomyelitis can affect the **femur**, this presentation typically does not lead to the classic **Garre's proliferative periostitis** characterized by significant bone apposition. - Osteomyelitis of the femur is often seen in long bones, but the **fibro-osseous proliferation** distinctive of Garre's is rare here. *Ribs* - **Osteomyelitis of the ribs** is possible but is not a common site for the specific manifestation of **Garre's osteomyelitis**. - Rib infections usually present differently and are often associated with other underlying conditions or trauma. *Small bones of hand* - **Osteomyelitis** can affect the small bones of the hand, but this is usually due to direct inoculation, puncture wounds, or spread from adjacent soft tissue infections. - The **proliferative periosteal reaction** characteristic of Garre's osteomyelitis is not typically observed in these bones.

Q: In which condition is chronic recurrent multifocal osteomyelitis primarily observed?

SAPHO syndrome. **SAPHO syndrome** * **Chronic recurrent multifocal osteomyelitis (CRMO)** is a prominent feature of **SAPHO syndrome** (Synovitis, Acne, Pustulosis, Hyperostosis, and Osteitis). * SAPHO syndrome is a **rare inflammatory disorder** characterized by bone and joint inflammation often accompanied by skin manifestations. * *Werner's syndrome (associated with premature aging)* * This syndrome is associated with **premature aging**, including features like short stature, bilateral cataracts, skin changes, and susceptibility to certain cancers. * It does **not primarily feature chronic recurrent multifocal osteomyelitis**. * *Waenberg's syndrome* * There is **no recognized medical condition** known as "Waenberg's syndrome." * This appears to be a **distractor option**. * *None of the options* * This option is incorrect because **SAPHO syndrome** is directly associated with chronic recurrent multifocal osteomyelitis.

Q: After chronic use of steroids, a patient presents with severe pain in the right hip and immobility. What is the most likely diagnosis?

Avascular necrosis. ***Avascular necrosis*** - Chronic **steroid use** is a major risk factor for avascular necrosis (AVN), particularly affecting the **femoral head**, leading to severe hip pain and immobility. - AVN occurs due to the death of bone tissue resulting from an **interruption of blood supply**, often manifesting as pain that worsens with weight-bearing. *Perthes disease* - This condition is a form of avascular necrosis of the femoral head, but it primarily affects **children**, typically between 4 and 10 years old. - The patient's age (adult) makes Perthes disease an unlikely diagnosis. *Hip dislocation* - Hip dislocation presents with **acute, severe pain** and an inability to bear weight, often following significant trauma. - There is no mention of trauma, and the patient has a history of chronic steroid use, which is not a direct cause of hip dislocation. *Osteoarthritis* - While osteoarthritis causes hip pain and stiffness, it typically develops **gradually** and is associated with aging, obesity, or previous joint injury. - The acute, severe pain after chronic steroid use is more characteristic of avascular necrosis.

Q: In the context of chronic bone infections, which condition is characterized by a chronic discharging sinus with necrotic bone?

Chronic osteomyelitis. ***Chronic osteomyelitis*** - This condition is precisely defined by the presence of a **chronic discharging sinus**, often leading to the expulsion of **necrotic bone** (sequestrum) or pus. - It involves persistent infection of the bone, frequently resulting from inadequately treated acute osteomyelitis or open fractures. *Acute osteomyelitis* - Characterized by rapid onset of severe pain, fever, and local signs of inflammation, but typically **lacks a long-standing discharging sinus**. - If left untreated, it can progress to chronic osteomyelitis. *Subacute osteomyelitis* - This is a less aggressive, often indolent form of osteomyelitis that presents with localized pain and swelling, but usually **without a discharging sinus**. - It can be difficult to diagnose due to its milder symptoms and sometimes subtle radiographic findings. *Garre's osteomyelitis* - Also known as **osteitis sclerosing**, this is a rare, non-suppurative form of osteomyelitis characterized by **periosteal new bone formation** and cortical thickening. - It typically does not involve a discharging sinus or evident necrotic bone, but rather a proliferative response to a low-grade infection.

Q: A 18-year-old male presents with a draining sinus on his left leg, accompanied by pus discharge and the discharge of bony pieces, since 3 months. What is the diagnosis?

Chronic osteomyelitis. ***Chronic osteomyelitis*** - A **draining sinus** with pus discharge and the extrusion of **bony pieces** (sequestra) is a classic presentation of chronic osteomyelitis. - The chronicity (3 months) and the presence of necrotic bone fragments confirm the diagnosis over acute infections or tumors. *Ewing's Sarcoma* - This is a highly malignant bone tumor that typically presents with **localized pain and swelling**, and sometimes a palpable mass. It does not typically present with a draining sinus or bony discharge. - While it can occur in adolescents, its presentation is more commonly characterized by rapid progression and systemic symptoms, rather than chronic drainage with sequestra. *Osteoid Osteoma* - This is a benign bone tumor characterized by **localized pain**, which is typically worse at night and relieved by NSAIDs. It does not lead to bone destruction severe enough to cause sinus tracts or discharge of bony pieces. - It usually presents as a small **nidus** within the bone that causes irritation, not an infective process with drainage. *Cellulitis* - This is a rapidly spreading bacterial infection of the **skin and subcutaneous tissue**, presenting with redness, warmth, swelling, and pain. It can cause pus discharge if an abscess forms, but it does not typically involve the discharge of bony pieces or persist as a chronic draining sinus from bone. - Cellulitis is a soft tissue infection and does not primarily involve bone unless it has progressed significantly, and even then, sequestra discharge is not typical.

Q: Triple deformity of the knee includes the following components, which one is not typically associated with it?

Extension of knee. ***Extension of knee*** - The "triple deformity of the knee" typically refers to the opposite of extension, which is **knee flexion**, along with other specific rotational and translational deformities. - **Knee extension** is not a component of this deformity; rather, a loss of full extension is often observed. *Flexion of knee* - **Knee flexion** is a characteristic component of the triple deformity, often presenting as a fixed flexion contracture. - This persistent flexed position contributes significantly to functional impairment. *Internal rotation of tibia* - **Internal rotation of the tibia** relative to the femur is a key rotational component of the described triple deformity. - This rotational malalignment contributes to the overall structural distortion of the knee joint. *Anterior subluxation of tibia* - **Anterior subluxation of the tibia** on the femur is the translational component of the triple deformity. - This displacement indicates instability and further compromises the biomechanics of the joint.

Q: What is the most common sequela of tuberculous spondylitis in an adolescent?

Bony ankylosis. ***Bony ankylosis*** - **Bony ankylosis** is a frequent outcome in successfully treated tuberculous spondylitis, particularly in adolescents due to their growth potential and robust healing responses. - The inflammatory process and subsequent healing, including bone repair, can lead to the fusion of vertebral bodies as the body attempts to stabilize the affected spinal segment. *Fibrous Ankylosis* - While **fibrous ankylosis** can occur, it's typically an earlier or less complete form of healing compared to bony ankylosis in the context of tuberculosis, which often leads to more extensive bone destruction and repair. - In adolescents, where osteoblastic activity is high, the body often progresses to a more stable bony fusion rather than a fibrous one. *Pathological dislocation* - **Pathological dislocation** is a severe complication that can occur due to extensive bone destruction and vertebral collapse, but it is not the most common sequela after treatment, especially with modern management. - Dislocation implies a loss of alignment and potentially severe neurological deficits, which are rarer than the healing process itself leading to fusion. *Chronic osteomyelitis* - **Chronic osteomyelitis** refers to persistent infection and inflammation within the bone. While tuberculous spondylitis is a form of osteomyelitis, if successfully treated, the infection is resolved, and the sequelae are related to the healing process itself (like ankylosis), not ongoing infection. - The question asks for the most common *sequela* (consequence of the disease or its treatment), assuming the infection has been managed.

Question 1

Garre's osteomyelitis: which of the following statements is false?

Accepted Answer

Moth eaten appearance in radiography

Answer

Prevalent in immune-competent patients

Answer

Common in children and young

Answer

Occurs due to staphylococcus aureus

Question 2

What is the condition commonly referred to as 'draughtsman's elbow'?

Accepted Answer

Olecranon bursitis

Answer

Lateral epicondylitis

Answer

Medial epicondylitis

Answer

Medial epicondyle avulsion fracture

Question 3

What is the most effective management strategy for hemarthrosis?

Accepted Answer

Needle aspiration to remove excess blood

Answer

Immobilization with a P.O.P. cast

Answer

Application of a compression bandage

Answer

All of the options

Question 4

Garre's osteomyelitis commonly involves

Accepted Answer

Jaw

Answer

Femur

Answer

Ribs

Answer

Small bones of hand

Question 5

In which condition is chronic recurrent multifocal osteomyelitis primarily observed?

Accepted Answer

SAPHO syndrome

Answer

Werner's syndrome (associated with premature aging)

Answer

Waenberg's syndrome

Answer

None of the options

Question 6

After chronic use of steroids, a patient presents with severe pain in the right hip and immobility. What is the most likely diagnosis?

Accepted Answer

Avascular necrosis

Answer

Hip dislocation

Answer

Osteoarthritis

Answer

Perthes disease

Question 7

In the context of chronic bone infections, which condition is characterized by a chronic discharging sinus with necrotic bone?

Accepted Answer

Chronic osteomyelitis

Answer

Acute osteomyelitis

Answer

Subacute osteomyelitis

Answer

Garre's osteomyelitis

Question 8

A 18-year-old male presents with a draining sinus on his left leg, accompanied by pus discharge and the discharge of bony pieces, since 3 months. What is the diagnosis?

Accepted Answer

Chronic osteomyelitis

Answer

Ewing's Sarcoma

Answer

Osteoid Osteoma

Answer

Cellulitis

Question 9

Triple deformity of the knee includes the following components, which one is not typically associated with it?

Accepted Answer

Extension of knee

Answer

Flexion of knee

Answer

Internal rotation of tibia

Answer

Anterior subluxation of tibia

Question 10

What is the most common sequela of tuberculous spondylitis in an adolescent?

Accepted Answer

Bony ankylosis

Answer

Fibrous Ankylosis

Answer

Pathological dislocation

Answer

Chronic osteomyelitis

Arthrology and Infections — MCQs

Arthrology and Infections — MCQs

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