Ultrasound image analysis of partially cystic thyroid nodules / 中国医师杂志

ABSTRACT

Objective:To investigate the diagnostic value of high frequency ultrasound in benign and malignant thyroid partially cystic nodules.Methods:The preoperative ultrasound features of 159 thyroid cystic and solid nodules confirmed by surgery and pathology in Shenzhen Longgang Central Hospital from June 2017 to January 2021 were retrospectively analyzed. According to the ultrasonic manifestations, it can be divided into four types: type Ⅰ, band separation or flocculent echo in the interior; type Ⅱ, the small papillary middle echo process was seen on the wall; type Ⅲ, with band separation or flocculent echo and papillary medium echo process; type Ⅳ, the internal was mainly solid echo, and the inner part was irregular small piece echo and fissure echo free echo. The coincidence rate of ultrasonic diagnosis and pathological results of all types was observed.Results:Among 159 cystic and solid thyroid nodules, 22 were malignant and 137 were benign. The coincidence rate of ultrasonic diagnosis and pathological results of type Ⅰ, Ⅱ, Ⅲ and Ⅳ cystic solid thyroid nodules were 97%(61/63), 80%(45/56), 90%(9/10) and 67%(20/30), respectively. Type Ⅰ, type Ⅱ, type Ⅲ were mainly cystic components, with cystic components ≥ 50%; In type Ⅳ, solid component was the main component and cystic component was less than 50%.Conclusions:The internal zonal separation or flocculent echo was the characteristic ultrasonic manifestation of benign cystic solid nodules; It is easy to be misdiagnosed because of the lowest coincidence rate of ultrasound diagnosis for cystic and solid thyroid nodules with internal solid echo, irregular small piece like and fissure like anechoic. Careful observation of the characteristics can improve the accuracy of ultrasound diagnosis.