FIGO classification system for uterine leiomyoma

Changed by Bahman Rasuli, 30 Dec 2022
Disclosures - updated 9 Nov 2022: Nothing to disclose

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The FIGO classification system for uterine leiomyoma (fibroids) classifies uterine leiomyomas based on location.

Usage

This classification system was developed for clinical and research purposes 2, however, in clinical use, there is significant variation in agreement 3.

Classification

Submucosal group
  • type 0: pedunculated intracavitary

  • type 1: <50% intramural

  • type 2: ≥50% intramural

Other group
  • type 3: 100% intramural; contacts endometrium

  • type 4: intramural

  • type 5: subserosal ≥50% intramural

  • type 6: subserosal <50% intramural

  • type 7: subserosal pedunculated

  • type 8: other, e.g. cervical, parasitic

Hybrid leiomyoma group
  • leiomyomas that impact both the endometrium and serosa

  • two numbers listed separately separated by a hyphen with the first number indicating the endometrial relationship and the second number the serosal relationship

  • -<p>The <strong>FIGO classification system for uterine leiomyoma (fibroids)</strong> classifies <a href="/articles/uterine-leiomyoma" title="Uterine leiomyomas">uterine leiomyomas</a> based on location.</p><h4>Usage</h4><p>This classification system was developed for clinical and research purposes <sup>2</sup>, however, in clinical use, there is significant variation in agreement <sup>3</sup>.</p><h4>Classification</h4><h5>Submucosal group</h5><ul>
  • -<li><p>type 0: pedunculated intracavitary</p></li>
  • -<li><p>type 1: &lt;50% intramural</p></li>
  • -<li><p>type 2: ≥50% intramural</p></li>
  • -</ul><h5>Other group</h5><ul>
  • -<li><p>type 3: 100% intramural; contacts endometrium</p></li>
  • -<li><p>type 4: intramural</p></li>
  • -<li><p>type 5: subserosal ≥50% intramural</p></li>
  • -<li><p>type 6: subserosal &lt;50% intramural</p></li>
  • -<li><p>type 7: subserosal pedunculated</p></li>
  • -<li><p>type 8: other, e.g. <a href="/articles/leiomyoma-of-the-uterine-cervix" title="Cervical fibroid">cervical</a>, <a href="/articles/parasitic-leiomyoma" title="Parasitic leiomyoma">parasitic</a></p></li>
  • -</ul><h5>Hybrid leiomyoma group </h5><ul>
  • -<li><p>leiomyomas that impact both the <a href="/articles/endometrium" title="Endometrium">endometrium</a> and serosa</p></li>
  • -<li><p>two numbers listed separately separated by a hyphen with the first number indicating the endometrial relationship and the second number the serosal relationship</p></li>
  • +<p>The <strong>FIGO classification system for uterine leiomyoma (fibroids)</strong> classifies <a href="/articles/uterine-leiomyoma" title="Uterine leiomyomas">uterine leiomyomas</a> based on location.</p><h4>Usage</h4><p>This classification system was developed for clinical and research purposes <sup>2</sup>, however, in clinical use, there is significant variation in agreement <sup>3</sup>.</p><h4>Classification</h4><h5>Submucosal group</h5><ul>
  • +<li><p>type 0: pedunculated intracavitary</p></li>
  • +<li><p>type 1: &lt;50% intramural</p></li>
  • +<li><p>type 2: ≥50% intramural</p></li>
  • +</ul><h5>Other group</h5><ul>
  • +<li><p>type 3: 100% intramural; contacts endometrium</p></li>
  • +<li><p>type 4: intramural</p></li>
  • +<li><p>type 5: subserosal ≥50% intramural</p></li>
  • +<li><p>type 6: subserosal &lt;50% intramural</p></li>
  • +<li><p>type 7: subserosal pedunculated</p></li>
  • +<li><p>type 8: other, e.g. <a href="/articles/leiomyoma-of-the-uterine-cervix" title="Cervical fibroid">cervical</a>, <a href="/articles/parasitic-leiomyoma" title="Parasitic leiomyoma">parasitic</a></p></li>
  • +</ul><h5>Hybrid leiomyoma group </h5><ul>
  • +<li><p>leiomyomas that impact both the <a href="/articles/endometrium" title="Endometrium">endometrium</a> and serosa</p></li>
  • +<li><p>two numbers listed separately separated by a hyphen with the first number indicating the endometrial relationship and the second number the serosal relationship</p></li>
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