形态：彗星状肿块，尾部位于塌陷的舌下间隙，头部位于下颌下间隙的后方。

Morphology: Comet-shaped mass with "tail" in collapsed SLS and "head" in posterior SMS.

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形态：彗星状肿块，尾部位于塌陷的舌下间隙，头部位于下颌下间隙的后方。

Morphology: Comet-shaped mass with "tail" in collapsed SLS and "head" in posterior SMS.

youdao