扩张的胆囊管内出现强回声团，后方伴声影，是胆囊管结石直接征象，但其超声检查的敏感性不高；
Strong echoes in the dilated cystic ducts with shadows in posterior were the direct sign of the cystic duct lithes, but the sensitivity was very low.
光滑肌瘤界限清晰，可体现为均质低徊声到高回声，伴后方加强。
Neurofibromas are well defined and may appear homogeneouslyhypoechoic to hyperechoic, with posterior enhancement.
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