Ovarian germ cell tumor MRI: Difference between revisions
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* Tumors are often seen divided into lobules by [[septa]] | * Tumors are often seen divided into lobules by [[septa]] | ||
* Reported signal characteristics include: | * Reported signal characteristics include: | ||
* T2: the septae are often hypointense | ** T2: the septae are often hypointense | ||
* isointense T1 C+ (Gd): the septae often show marked enhancement | ** isointense T1 C+ (Gd): the septae often show marked enhancement | ||
'''Mature (cystic) ovarian teratoma'''<ref name= abc> Mature (cystic) ovarian teratoma. http://radiopaedia.org/articles/mature-cystic-ovarian-teratoma. URL Accessed on November 11, 2015</ref> | '''Mature (cystic) ovarian teratoma'''<ref name= abc> Mature (cystic) ovarian teratoma. http://radiopaedia.org/articles/mature-cystic-ovarian-teratoma. URL Accessed on November 11, 2015</ref> | ||
Revision as of 21:13, 30 November 2015
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Ovarian germ cell tumor Microchapters |
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Diagnosis |
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Treatment |
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Case Studies |
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Ovarian germ cell tumor MRI On the Web |
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American Roentgen Ray Society Images of Ovarian germ cell tumor MRI |
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Risk calculators and risk factors for Ovarian germ cell tumor MRI |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Monalisa Dmello, M.B,B.S., M.D. [2]
Overview
It is difficult to distinguish subtypes of ovarian germ cell tumor on MRI alone. The majority of ovarian germ cell tumors have a solid and cystic appearance with areas of hemorrhage and necrosis. On MRI, ovarian germ cell tumors may be characterized by T2: the septae are often hypointense or isointense T1 C+ (Gd): the septae often show marked enhancement (dysgerminoma), the presence of a prominent solid component containing calcifications and small foci of fat (mature teratoma), areas of haemorrhage can also be seen (yolk sac tumor).[1][2][3]
Pelvic MRI
Dysgerminomas [1]
- Tumors are often seen divided into lobules by septa
- Reported signal characteristics include:
- T2: the septae are often hypointense
- isointense T1 C+ (Gd): the septae often show marked enhancement
Mature (cystic) ovarian teratoma[2]
- MR evaluation usually tends to be reserved for difficult cases, but is exquisitely sensitive to fat components
- Both fat suppression techniques and chemical shift artefact can be used to confirm the presence of fat
- Enhancement is also able to identify solid invasive components, and as such can be used to accurately locally stage malignant variants
Immature ovarian teratoma[4]
- The presence of a prominent solid component containing calcifications and small foci of fat is suggestive. Cystic components may contain serous, mucinous, or fatty sebaceous material
- Haemorrhage may be present
Ovarian yolk sac tumor [3]
- They can be associated with prominent signal voids on MRI
- Areas of haemorrhage can also be seen
References
- ↑ 1.0 1.1 Ovarian dysgerminoma. http://radiopaedia.org/articles/ovarian-dysgerminoma. URL Accessed on November 11, 2015
- ↑ 2.0 2.1 Mature (cystic) ovarian teratoma. http://radiopaedia.org/articles/mature-cystic-ovarian-teratoma. URL Accessed on November 11, 2015
- ↑ 3.0 3.1 Ovarian yolk sac tumour. http://radiopaedia.org/articles/ovarian-yolk-sac-tumour. URL Accessed on November 11, 2015
- ↑ Immature ovarian teratoma. http://radiopaedia.org/articles/immature-ovarian-teratoma. URL Accessed on November 11, 2015