On a radiograph of the hand used for bone age assessment (Greulich-Pyle method), fusion of the growth plate of the distal radius indicates skeletal maturity at approximately:
- A 14 years in females, 16 years in males
- B 12 years in both sexes
- C 17 years in females, 19 years in males ✓
- D 21 years in both sexes
Correct answer: C. 17 years in females, 19 years in males
Explanation
Fusion of the distal radial epiphysis to the metaphysis is a late event in skeletal maturation, signalling near-complete skeletal maturity. In the Greulich-Pyle atlas, distal radial fusion occurs around 17 years in females and 19 years in males, reflecting the earlier onset of puberty in girls. The hand and wrist radiograph is the standard skeletal age assessment tool; the sequence of ossification and fusion provides the bone age. Earlier events (like pisiform or adductor sesamoid appearance) mark the onset of puberty rather than final maturity.
Reference: BD Chaurasia's Human Anatomy, 8th ed.
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Written and medically reviewed by the StethoPrep medical team.