In skeletal age estimation in an adult using the pubic symphysis, which surface morphology of the symphyseal face corresponds MOST closely to the Suchey-Brooks Phase IV (estimated age 23–57 years)?

• A Billowing surface with distinct ridges and furrows; no rim present
• B Smooth, flat symphyseal face with complete bony rim; beginning dorsal plateau formation ✓
• C Gradual deterioration of rim with irregular surface and possible erosion; lipping
• D Heavily eroded, irregular surface with breakdown and resorption of the ventral margin

Explanation

The Suchey-Brooks method (revised Todd classification) for pubic symphysis describes six phases. Phase IV (peak age approximately 35 years, range 23–57 years) is characterised by a smooth, flat or slightly undulating symphyseal face with a well-defined, complete bony rim (both dorsal and ventral margins) but with the older billowing texture from early phases now largely replaced by smooth bone. Some early porosity may begin at the superior extremity. Phase I/II shows prominent ridges and furrows (youth). Phase V–VI shows progressive erosion, osteoarthritis, and lipping typical of older adults.

Reference: The Essentials of Forensic Medicine and Toxicology (Narayan Reddy), 34th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.