Bone Age in Girls Aged 11 Years — Greulich-Pyle Hand and Wrist X-Ray Reference
Bone age assessment using a left hand and wrist radiograph is a cornerstone of pediatric endocrine and growth evaluation. The Greulich-Pyle method compares a patient’s skeletal maturation to standard atlas plates derived from healthy North American children. In 11-year-old girls, this assessment is particularly important given the proximity to peak pubertal growth, making it valuable in workups for precocious puberty, growth hormone deficiency, and constitutional growth delay.
Expected Ossification Centers and Skeletal Findings
By 11 years of age in girls, all eight carpal bones are typically ossified. The capitate and hamate appear in early infancy, the triquetral by approximately 2–3 years, the lunate by 3–4 years, the scaphoid, trapezium, and trapezoid between 4–6 years, and the pisiform typically between 9–12 years in girls — meaning it is expected to be visible or just appearing at this age. Confirmation of pisiform ossification is an important landmark at this stage.
Epiphyseal development is well advanced by age 11 in girls. The distal radial epiphysis, present since approximately 1 year of age, should now show significant widening and early capping over the metaphysis. The distal ulnar epiphysis, typically appearing between 5–7 years, is well established. Epiphyses of the metacarpals and all phalanges are present and show progressive widening and density.
- Pisiform: Ossification expected at or near this age in girls
- Distal radius epiphysis: Well-formed, with early metaphyseal capping
- Distal ulnar epiphysis: Fully present and maturing
- Adductor sesamoid of the thumb: Typically appears in the peripubertal period; its presence or absence helps refine skeletal maturity around this age
- All carpal centers: Ossified and progressively enlarging
Clinical Pearls
Girls are skeletally more mature than boys of the same chronological age by approximately 1–2 years, a difference well documented in the Greulich-Pyle atlas. At 11 years, the standard deviation for bone age is roughly ±1 year; findings within this range are considered normal variants. A bone age significantly advanced beyond 13 years in an 11-year-old girl should raise concern for precocious puberty or exogenous androgen/estrogen exposure, while a bone age below 9 years may suggest hypothyroidism, growth hormone deficiency, or constitutional delay of growth and puberty.
A key interpretive pitfall is population variability: the Greulich-Pyle atlas was standardized on mid-20th-century North American children of European descent, and skeletal maturation norms may differ across ethnic groups. Clinical correlation with growth charts, pubertal staging (Tanner), and hormonal data is always essential. Reference: Greulich WW, Pyle SI. Radiographic Atlas of Skeletal Development of the Hand and Wrist. 2nd ed. Stanford University Press, 1959.
