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Normal ovaries and functional cysts: MR appearance

E K Outwater1, D G Mitchell

  • 1Department of Radiology, Thomas Jefferson University Hospital, Philadelphia, PA 19107-5244, USA.

Radiology
|February 1, 1996
PubMed
Summary
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Magnetic resonance (MR) imaging reveals distinct zonal anatomy in most normal premenopausal ovaries, which is less apparent in postmenopausal ovaries. Functional cysts with enhancing walls are common across all age groups.

Area of Science:

  • Radiology
  • Gynecologic Imaging
  • Pelvic MRI

Background:

  • Normal ovarian morphology on magnetic resonance (MR) imaging is crucial for differentiating physiological findings from pathology.
  • Understanding the imaging characteristics of ovarian stroma and functional cysts aids in accurate diagnosis.

Purpose of the Study:

  • To characterize the MR imaging features of functional cysts and ovarian stroma in normal ovaries.
  • To correlate these features with patient age and menopausal status.

Main Methods:

  • Fifty-six women with surgically confirmed normal ovaries underwent MR imaging.
  • Gadolinium-enhanced, fat-saturated sequences were utilized in a subset of patients.
  • Ovarian and cyst dimensions, cyst counts, and signal intensities of stroma and cysts were analyzed.

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Main Results:

  • Zonal differentiation was observed in 70% of ovaries on T2-weighted images.
  • Ovarian stroma enhancement was typically less than myometrial enhancement.
  • Cyst walls often displayed lower T2 signal intensity and greater enhancement compared to ovarian stroma, irrespective of age.

Conclusions:

  • Premenopausal ovaries commonly exhibit zonal anatomy on MR imaging, a feature less pronounced in postmenopausal ovaries.
  • Functional cysts with identifiable enhancing walls are frequently encountered in women of all ages.