Low-Grade Endometrial Stromal Sarcoma with a Nodule-in-Nodule Appearance in Preoperative Magnetic Resonance Images
Transvaginal ultrasound images: (a) the tumor margin and the underlying myometrium were hyperechoic and well defined. Several small nodules within a large mass were isoechoic and hypoechoic compared to the normal uterine myometrium; (b) an anechoic unilocular cystic area within a small nodule was observed (indicated by the arrow).
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