For estimating the age of an adult skeleton between roughly 18 and 50 years, which anatomical site provides the most reliable age-related morphological changes when assessed by a phased scoring system?
- A Coronal suture
- B Pubic symphyseal surface ✓
- C Proximal end of the fibula
- D Manubriosternal joint
Correct answer: B. Pubic symphyseal surface
Explanation
The metamorphosis of the pubic symphyseal surface proceeds through defined phases from billowed ridged surfaces in youth to smooth porous surfaces in old age. Todd described ten such phases, and later systems refined them, making the symphysis one of the most reliable adult skeletal indicators through mid-life. Suture closure and sternal fusion are far more variable. The proximal fibula has no established phased aging standard.
Reference: Robbins and Cotran Pathologic Basis of Disease, 10th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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