Endometrial polyps: MR imaging features

Soichiro Hase, Akihito Mitsumori, Ryota Inai, Mitsuhiro Takemoto, Shinichiro Matsubara, Nobuo Akamatsu, Masayoshi Fujisawa, Ikuo Joja, Shuhei Sato, Susumu Kanazawa

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


The purpose of this study is to evaluate the diagnostic usefulness of magnetic resonance imaging (MRI) characteristics of endometrial polyps in order to differentiate them from other endometrial lesions. MRI was retrospectively reviewed in 40 patients with pathologically proven endometrial polyps. Special attention was paid to the sizes, shapes, margins, internal structures, signal intensities, and post-contrast enhancement patterns. A central fibrous core, intratumoral cysts, and hemorrhage were seen in 30 (75%), 22 (55%), and 14 (35%) patients, respectively. The predominant signal intensity of the lesions showed iso-to slightly low signal intensity relative to the endometrium on T2-weighted images in 36 (90%), low signal intensity on diffusion-weighted images in 32 (80%), and strong or moderate enhancement on enhanced Tl-weighted images in 28 patients (70%), respectively. In 32 (80%) patients, the endometrial polyps showed global or partial early enhancement. On dynamic study, rapid enhancement with a persistent strong enhancement pattern was seen in 17 (42.5%) and a gradually increasing enhancement pattern was seen in 17 patients (42.5%). These MRI features can be helpful to distinguish the endometrial polyps from various other endometrial lesions.

Original languageEnglish
Pages (from-to)475-485
Number of pages11
JournalActa medica Okayama
Issue number6
Publication statusPublished - 2012
Externally publishedYes


  • Central fibrous core
  • Endometrial polyp
  • Intratumoral cyst
  • Magnetic resonance imaging (MRI)
  • Uterus

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)


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