Ovarian cancer MRI: Difference between revisions
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Hudakarman (talk | contribs) MRI |
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{{Ovarian cancer}} | {{Ovarian cancer}} | ||
Endometrioid carcinoma of the ovary | |||
Endometrioid carcinoma of the ovary: | |||
Pelvic MRI | Pelvic MRI | ||
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Reported signal characteristics include | Reported signal characteristics include | ||
T2: | T2: | ||
relatively low signal intensity of the | |||
relatively low signal intensity of the tumor wall | |||
a shading sign may be seen | a shading sign may be seen | ||
T1 C + (Gd): can show mild enhancement | T1 C + (Gd): can show mild enhancement | ||
Ovarian serous | Ovarian serous cystuadenocarcinoma | ||
MRI | MRI is the modality of choice in the characterization of ovarian malignancy and in the detection of lymphatic, peritoneal, and distant metastases, both for preoperative planning and post treatment follow up. | ||
The cystic components are high T2, low T1 signal, unless there has been intralesional hemorrhage (c.f. mucinous cystuadenocarcinoma, where there is typically slightly increased T1 signal of the cystic component) | |||
The cystic components are high T2, low T1 signal, unless there has been intralesional | |||
Solid malignant components demonstrate intermediate T1 and T2 signal, restricted diffusion, and gadolinium enhancement. | Solid malignant components demonstrate intermediate T1 and T2 signal, restricted diffusion, and gadolinium enhancement. | ||
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MRI Ovarian mucinous cystadenocarcinoma | MRI Ovarian mucinous cystadenocarcinoma | ||
T1 | |||
the signal intensity of mucin on T1-weighted images varies depending on the degree of mucin concentration | T1: the signal intensity of mucin on T1-weighted images varies depending on the degree of mucin concentration | ||
on T1-weighted images, loculi with watery mucin have a lower signal intensity than loculi with thicker mucin. | on T1-weighted images, loculi with watery mucin have a lower signal intensity than loculi with thicker mucin. | ||
T2 | T2 | ||
on T2-weighted images, the corresponding signal intensities are flipped, so that loculi with watery mucin have high signal intensity and loculi with thicker mucin appear slightly hypointense. | on T2-weighted images, the corresponding signal intensities are flipped, so that loculi with watery mucin have high signal intensity and loculi with thicker mucin appear slightly hypointense. | ||
Revision as of 18:54, 10 July 2019
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]
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Ovarian cancer Microchapters |
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Diagnosis |
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Treatment |
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Case Studies |
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Ovarian cancer MRI On the Web |
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American Roentgen Ray Society Images of Ovarian cancer MRI |
Endometrioid carcinoma of the ovary:
Pelvic MRI
Reported signal characteristics include
T2:
relatively low signal intensity of the tumor wall
a shading sign may be seen
T1 C + (Gd): can show mild enhancement
Ovarian serous cystuadenocarcinoma
MRI is the modality of choice in the characterization of ovarian malignancy and in the detection of lymphatic, peritoneal, and distant metastases, both for preoperative planning and post treatment follow up.
The cystic components are high T2, low T1 signal, unless there has been intralesional hemorrhage (c.f. mucinous cystuadenocarcinoma, where there is typically slightly increased T1 signal of the cystic component)
Solid malignant components demonstrate intermediate T1 and T2 signal, restricted diffusion, and gadolinium enhancement.
DWI is useful for detection of distant metastases.
MRI Ovarian mucinous cystadenocarcinoma
T1: the signal intensity of mucin on T1-weighted images varies depending on the degree of mucin concentration
on T1-weighted images, loculi with watery mucin have a lower signal intensity than loculi with thicker mucin.
T2
on T2-weighted images, the corresponding signal intensities are flipped, so that loculi with watery mucin have high signal intensity and loculi with thicker mucin appear slightly hypointense.
MRI
Often seen as a cystic ovarian mass with the margin being generally smooth. Solid protrusions are often both round and few in number.
Reported signal characteristics include
T1: can vary from low to very high (often dependent on haemorrhagic component(s), not a specific feature)