8th Sem End Posting MCQ

A 46-year-old patient came to the clinic with complaints of scaly lesions on the skin and joint pain for 1 week. On examination, Scaly erythematous plaques and guttate lesions were present, and arthritis of the knee and distal interphalangeal joints were seen. The patient was managed with NSAIDs. Which of the following is the diagnosis of this condition?

• Psoriatic arthritis

• Osteoarthritis

• Gout

• Osteoporosis

The initial abnormality in primary osteoarthritis is

• In the synovial membrane

• Sclerosis of cartilage

• Fibrillation of cartilage

• An osteophyte

• A pannus

The initial abnormality in rheumatoid arthritis is

• In the synovial membrane

• Sclerosis of cartilage

• Fibrillation of cartilage

• An osteophyte

• A pannus

Unicompartmental arthroplasty is contraindicated in which patient:

• A patient with osteonecrosis of medial condyle

• A patient with rheumatoid arthritis concentrated in the medial compartment

• A patient with osteoarthritis of medial condyle

• A patient with prior patellectomy with medial compartment osteoarthritis

• A patient with posttraumatic arthritis of the medial tibial plateau

Sequestrum is defined as which of the following?

• Reactive bone in acute osteomyelitis

• Reactive bone in chronic osteomyelitis

• Necrotic bone providing a nidus for infection in chronic osteomyelitis

• Healthy bone adjacent to chronic osteomyelitis

• Healthy bone adjacent to acute osteomyelitis

An afebrile 8-year-old Ethiopian girl presented with a limp. Two years earlier, she had had mild trauma followed by a "bone infection" and had received short courses of oral antibiotics. Examination revealed a small, pus-secreting wound on the anterior aspect of her left thigh. Her blood count was normal, but her erythrocyte sedimentation rate was 48 mm. A radiograph is shown in Figure . What do the white arrowheads identify in this imaging study?

• Bone infarct

• Sequestrum

• Involucrum

• Osteosarcoma

• Hematoma

Septic arthritis in pediatric patients may occur secondary to direct intra-articular spread from metaphyseal osteomyelitis. This can occur in all the following joints EXCEPT?

• Hip

• Ankle

• Shoulder

• Elbow

• Knee

A 20-year-old man presents with erythema, swelling, and pain at the left sternoclavicular joint. His temperature is 38.9 degrees Celsius, serum WBC is 14,000, and his C-reactive protein is elevated. He reports that he uses IV heroin. Joint aspiration shows many grams stain positive organisms. Which of the following organisms is the most likely pathogen?

• Propionibacterium acnes

• Staphylococcus aureus

• Group B streptococcus

• Neisseria gonorrhea

• Enterococcus coli

Which of the following is the best choice for diagnosing vertebral osteomyelitis?

• Gallium 67

• Indium 111

• Technetium 99m

• Iodine 123

Most common organism causing chronic osteomyelitis is:

• Staphylococcus aureus

• Pseudomonas aeruginosa

• E. coli

• Klebsiella pneumoniae