The Tanner-Whitehouse (TW) method is a way of assessing the bone age of children. There are several variations of this method, but all use a DP radiograph of the left hand and wrist to assess the relative maturity of the bones of the patient.
The TW2 (Tanner-Whitehouse 2) methods 1:
- RUS (radius-ulna-short bones): 13 bones including the radius, ulna and short bones of the thumb, middle and little fingers
- carpus: 7 carpal bones
- 20-bones method: combines the two
Each of the bones that is being evaluated is compared to a standard set of bones at different stages of maturation. A score is assigned to each bone based on maturation and sex of the patient.
Once all the bones have been scored, a total score is generated by adding all bone scores together and then plotted on a graph to determine how the bone age relates to the chronological age.
The TW2 method was developed using radiographs from average-class children in the UK between 1950 and 1960. TW3 (Tanner-Whitehouse 3) method is an update published in 2001 1.
- 1. Satoh M. Bone age: assessment methods and clinical applications. (2020) Clinical Pediatric Endocrinology. 24 (4): 143. doi:10.1297/cpe.24.143 - Pubmed
- 2. NM Drayer, LA Cox. Assessment of bone ages by the Tanner‐Whitehouse method using a computer‐aided system. (1994) Acta Pædiatrica. 83: 77. doi:10.1111/j.1651-2227.1994.tb13429.x - Pubmed
- 3. Cox L. Tanner-Whitehouse Method of Assessing Skeletal Maturity: Problems and Common Errors. (1996) Hormone research. doi:10.1159/000184848 - Pubmed