If it is unclear whether a mass is due to a fluid-filled abscess or to a solid mass such as a tumor, a test such as an ultrasound may be done.

如果现在还不清楚是否有大规模的原因是充满液体的脓肿或一个坚实的群众，如肿瘤，测试，如超声波可以做到的。

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Germ cell tumor: Usually solid enhancement and larger with more mass effect.

生殖细胞瘤：通常为实质部分强化，一般体积较大，且伴有占位效应。

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X-rays and ultrasound had failed to clarify whether the mass was a fluid-filled cyst or a solid tumor.

FORBES: By Valerie Brown