Is [ Construction principle of the Taiji diagram based on the observation of 24 solar terms ]?
the Taiji diagram was made according to the diurnal rhythm in a year, which was obtained from observation of 24 solar terms in ancient times. As a great scientific achievement in ancient China, the Taiji diagram has profound influence and should be reevaluated on an academic level.
Thyroid nodules with minimal cystic changes have a low risk of malignancy, similar to that of partially cystic nodules regardless of echogenicity or the presence of suspicious US features. The US lexicon could define solid nodules as nodules with purely solid internal content in order to enhance the accuracy of estimated risks of malignancy.