PT  - JOURNAL ARTICLE
AU  - Pöhlmann, Michael
AU  - Freesmeyer, Martin
AU  - Gühne, Falk
TI  - SPECT/CT for Discrimination Between Active and Inactive Os Trigonum in Posterior Ankle Syndrome
AID  - 10.2967/jnmt.124.269284
DP  - 2025 Apr 01
TA  - Journal of Nuclear Medicine Technology
PG  - jnmt.124.269284
4099  - http://tech.snmjournals.org/content/early/2025/04/01/jnmt.124.269284.short
4100  - http://tech.snmjournals.org/content/early/2025/04/01/jnmt.124.269284.full
AB  - [99mTc]-3,3-diphosphono-1,2-propanodicarboxylic acid bone scintigraphy was used to differentiate between posterior impingement syndrome and Haglund syndrome in a 34-y-old man with unclear right-sided ankle pain. The patient had an accessory os trigonum bilaterally, and previous x-ray, MRI, and CT were inconclusive. Using SPECT/CT with new iterative reconstruction algorithms based on CT images, the pathologic activation of bone metabolism at the right-sided os trigonum and the adjacent talus joint was revealed. Other causes of posterior ankle pain were ruled out, and posterior impingement syndrome was diagnosed.