Examkin

Soru

Zorluk: OrtaPediatric Musculoskeletal Disorders

Match each pediatric patient's clinical presentation with the most accurate description of the underlying pathophysiology or anatomic abnormality.

  • A 13-year-old boy with a BMI at the 97th percentile presents with a 3-week history of left knee pain and demonstrates obligatory external rotation when the left hip is passively flexed.Posterior and inferior displacement of the proximal femoral epiphysis relative to the metaphysis
  • A 6-year-old boy with a normal BMI presents with an insidious onset of a mild, painless limp for 2 months and shows decreased hip abduction and internal rotation on examination.Idiopathic avascular necrosis and subsequent fragmentation of the proximal femoral head
  • A 14-year-old boy who plays competitive basketball presents with progressive anterior knee pain and a tender, prominent bony mass distal to the patella.Traction apophysitis resulting in microtrauma at the insertion of the patellar tendon
  • A 3-year-old girl refuses to use her right arm, holding it pronated and extended against her side after her older sibling abruptly pulled her by the hand.Slippage of the annular ligament over the radial head into the radiocapitellar joint

Cevap

The clinical presentations correctly match with their pathophysiological descriptions as follows: the obese adolescent with referred knee pain matches posterior epiphyseal displacement (SCFE); the 6-year-old with an insidious limp matches avascular necrosis (Legg-Calvé-Perthes); the adolescent athlete with a prominent tibial tubercle matches traction apophysitis (Osgood-Schlatter); and the toddler with a pulled arm matches annular ligament slippage (radial head subluxation).
Each clinical vignette contains pathognomonic demographic details, injury mechanisms, and physical exam findings that uniquely identify a specific pediatric musculoskeletal disorder. Correctly matching them requires translating the clinical diagnosis into its underlying pathophysiological mechanism.

Adım Adım Çözüm

1
Analyze the first presentation (13-year-old obese male with knee pain and hip external rotation).
Identify the diagnosis as Slipped Capital Femoral Epiphysis (SCFE), which corresponds to the displacement of the proximal femoral epiphysis.
Obesity, adolescent age, and referred knee pain with restricted hip internal rotation are pathognomonic for SCFE.
2
Analyze the second presentation (6-year-old male with an insidious painless limp).
Identify the diagnosis as Legg-Calvé-Perthes disease, which corresponds to idiopathic avascular necrosis of the femoral head.
The demographic (age 4-8) and the chronic, indolent nature of the limp without systemic symptoms point to avascular necrosis rather than acute inflammatory processes.
3
Analyze the third presentation (14-year-old athlete with tender tibial tubercle).
Identify the diagnosis as Osgood-Schlatter disease, which corresponds to traction apophysitis at the patellar tendon insertion.
Localized pain at the tibial tubercle in an active adolescent undergoing a growth spurt is the hallmark of this condition.
4
Analyze the fourth presentation (3-year-old girl with a pulled, pronated arm).
Identify the diagnosis as radial head subluxation, which corresponds to the slippage of the annular ligament.
The mechanism of injury (axial traction) and the characteristic posture of the arm perfectly describe nursemaid's elbow.

Anahtar Kavram

Pathophysiology and clinical presentation of common pediatric musculoskeletal disorders
Bu soruyu puanla

Konular

Pediatric Musculoskeletal Disorders

Bu konudan daha fazla soru