Difference between revisions of "Ovarian cancer MRI"

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(MRI)
(MRI)
 
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'''[[Ovarian serous cystadenocarcinoma]]'''
 
'''[[Ovarian serous cystadenocarcinoma]]'''
*[[MRI]] is the modality of choice in the characterization of [[ovarian malignancy]] and in the detection of [[lymphatic]], [[peritoneal]], and distant [[metastases]]
+
*[[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 evaluation|preoperative]] planning and post-treatment follow up.
 
*Both for [[Preoperative evaluation|preoperative]] planning and post-treatment follow up.
 
*The cystic components  
 
*The cystic components  
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**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 a 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 a high signal intensity and loculi with thicker mucin appear slightly hypointense.
 
*[[MRI]]
 
*[[MRI]]
 
*Often seen as a cystic [[ovarian mass]] with the margin being generally smooth. Solid protrusions are often both round and few in number.
 
*Often seen as a cystic [[ovarian mass]] with the margin being generally smooth. Solid protrusions are often both round and few in number.

Latest revision as of 15:32, 13 September 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] Huda A. Karman, M.D.

Ovarian cancer Microchapters

Home

Patient Information

Overview

Historical Perspective

Classifications

Pathophysiology

Causes of Ovarian cancer

Differentiating Ovarian cancer from other Diseases

Epidemiology & Demographics

Risk Factors

Screening

Natural History, Complications & Prognosis

Diagnosis

History & Symptoms

Physical Examination

Staging

Laboratory Findings

Chest X Ray

CT

MRI

Echocardiography or Ultrasound

Other Imaging Findings

Other Diagnostic Studies

Treatment

Medical Therapy

Surgery

Primary Prevention

Secondary Prevention

Cost-Effectiveness of Therapy

Future or Investigational Therapies

Case Studies

Case #1

Ovarian cancer MRI On the Web

Most recent articles

Most cited articles

Review articles

CME Programs

Powerpoint slides

Images

American Roentgen Ray Society Images of Ovarian cancer MRI

All Images
X-rays
Echo & Ultrasound
CT Images
MRI

Ongoing Trials at Clinical Trials.gov

US National Guidelines Clearinghouse

NICE Guidance

FDA on Ovarian cancer MRI

CDC on Ovarian cancer MRI

Ovarian cancer MRI in the news

Blogs on Ovarian cancer MRI

Directions to Hospitals Treating Ovarian cancer

Risk calculators and risk factors for Ovarian cancer MRI

Overview

MRI of the pelvis, abdomen, and chest can be helpful as one of the evaluating tools of ovarian cancer and its extent and metastasis. CT scan be used for preoperative staging to look for lymphadenopathy, peritoneal, and distant metastases.

MRI

Endometrioid carcinoma of the ovary

Pelvic MRI: Reported signal characteristics include:

  • T2:
    • Relatively low signal intensity of the tumor wall
    • Shading sign may be seen
  • T1C+(Gd):
    • Can show mild enhancement

Ovarian serous cystadenocarcinoma

  • 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
    • If there has been intralesional hemorrhage (c.f. mucinous cystadenocarcinoma, 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 the detection of distant metastases.

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 a 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 the hemorrhagic component(s), not a specific feature)

References


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