Bone Age
Also written as BA.
There is often a family history and bone age is lower than
What our notes say
- There is often a family history and bone age is lower than (Davidson's Essentials of Medicine - 2nd)
- Pubertal development should be monitored by periodic examination, and skeletal maturation is evaluated by serial radiographs of the hand and wrist for bone age. (Congenital Adrenal Hyperplasia)
- -¢- Bone age is determined by:\n1- At birth ~ by x-ray knee.\n2- Later on ~ by x-ray wrist.(bone age = count of carpal bones-1)\nI 1 t h"ldh 00 d ~ fr om fu SIOn\n3-naect. (BABY NELSON PEADS)
- Usually heavier and taller and bone age is advanced than peers.\n2. (BABY NELSON PEADS)
- For causes of decreased linear growth, length decreases first or at the same time as\nweight (e.g., GH deficiency).\n• BMI is accepted as best clinical indicator for measure of under- and overweight.\n• For bone age-reference standards, use radiographs of left hand and wrist. (Kaplan Pediatrics pdf-notes 201506051322 - flattened (2))
- ism. ● X-ray of the wrist and hand: allows estimation of bone age. (Davidson's Essentials of Medicine - 2nd)
Study material on Bone Age
- Devendra K. Gupta, Krishna M. Goel - Hutchison’s Paediatrics. chdhe-Jaypee Brothers (2012)
- BABY NELSON PEADS
- Kaplan Pediatrics pdf-notes 201506051322 - flattened (2)
Practice questions on Bone Age
A 7-year-old boy presents with pubic hair development, accelerated bone age, prepubertal testes, and markedly elevated 17-OHP. What is the diagnosis?
- CAH — 21-hydroxylase deficiency
- McCune-Albright syndrome
- Central precocious puberty
- Leydig cell tumour
Answer: A. Congenital Adrenal Hyperplasia (CAH) due to 21-hydroxylase deficiency causes virilization and advanced bone age due to excess adrenal androgens. The testes remain prepubertal because the androgen source is adrenal, not testicular.