Question

In medicolegal examination, the accused 18-year-old male claims he is 16 years old. Which joint x-ray should be done?

• A. Head & shoulder
• B. Elbow and ankle
• C. Knee and wrist
• D. Elbow & hip

Hint:

In forensic age estimation, the knee and wrist are preferred joints for x-rays due to their sensitivity to age-related ossification changes.

Answer 1

The Correct Option is C

Step 1: Define the medicolegal goal.
We must confirm whether an apparently 18-year-old male is really 16. Age estimation in living persons rests on radiological assessment of bone maturity - specifically which epiphyses (growth plate ends) have appeared and which have fused. The right answer is the pair of joints whose fusion happens within and around the disputed window.

Step 2: Pick joints whose epiphyses change in the mid-to-late teens.
To discriminate 16 vs 18 years, we need bones that are actively fusing in that period:
• The wrist (lower radius/ulna and carpals) is the classic site for age estimation through the teens; its epiphyses fuse around $17$-$19$ years in males.
• The knee (lower femur, upper tibia) carries ossification centres that mature and fuse over roughly the same late-teen span.

Step 3: Why this pair, not the others.
• Elbow epiphyses largely fuse earlier (by about $14$-$17$ years), so by 18 they are already united and add little discriminating power at this exact age.
• Ankle and hip fusions, and head/shoulder views, are less informative for separating 16 from 18 than the wrist and knee combination, which brackets the question precisely.

Step 4: Interpretation.
If the wrist and knee epiphyses are fully fused, the skeleton is consistent with $\geq 18$ years, contradicting the claimed 16; if still open, the younger claim gains support. These films give an approximate age to be combined with other forensic data.

Final answer: Order Option 3 - X-rays of the knee and wrist.