A 13-year-old obese male presents with insidious onset of left groin pain and a limp. On examination, there is obligate external rotation of the hip during flexion. What is the most likely diagnosis?
ALegg-Calve-Perthes disease
BSlipped Capital Femoral Epiphysis (SCFE)
CDevelopmental Dysplasia of the Hip (DDH)
DTransient synovitis
Explanation: SCFE typically presents in overweight or obese adolescents (ages 10-16). The classic physical exam finding is obligate external rotation of the hip when passively flexed.