2 MCQs in Pediatrics for NEET PG
A 3-year-old boy with disproportionate short stature is brought to the pediatric clinic. On examination, he has frontal bossing, midface hypoplasia, and markedly shortened proximal limbs compared to distal segments. Pelvic radiography shows the characteristic finding marked as **A** in the diagram — a champagne-glass pelvis with narrow sacrosciatic notches and horizontal acetabular roofs. Which of the following best explains the skeletal phenotype in this child?
A 3-year-old boy presents with disproportionate short stature (height at 5th centile, head circumference at 95th centile), frontal bossing, midface hypoplasia, rhizomelic limb shortening, trident hand, and lumbar lordosis. Skeletal survey confirms achondroplasia. The structure marked **A** in the diagram shows the characteristic pelvic appearance in this condition. Which of the following best describes the pathological anatomy of the structure marked **A**?
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