In the forensic examination of skeletal remains, the pubic symphysis morphology is used for age estimation. Which of the following correctly describes the pubic symphysis changes with advancing age?
- A Young adults have a flat, featureless symphysis with no ridges; ridges and grooves develop in middle age
- B Young adults have a billowing surface with horizontal ridges; with age the surface becomes flat then progressively eroded with rim formation in older adults ✓
- C The symphysis is fused across the joint in all adults over 30 years
- D The symphysis degenerates predictably after 25 years showing osteophytes only in males
Explanation
The Todd pubic symphysis aging system (10 phases) describes a predictable morphological sequence: phases 1–3 (young adults, 18–24 years) show a billowing surface with pronounced horizontal ridges and grooves (like a freshly ploughed field); phases 4–6 show progressive flattening of ridges; later phases (7–10, older adults 35+ years) show a flat, eroded surface with a distinct rim (dorsal plateau and ventral rampart development), and ultimately a rough, irregular face with lipping. This sequence applies to both sexes, though the Suchey-Brooks modification (6 phases) is currently preferred.
Reference: The Essentials of Forensic Medicine and Toxicology (Narayan Reddy), 34th ed.
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Written and medically reviewed by the StethoPrep medical team.