> For the complete documentation index, see [llms.txt](https://docs.snomed.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.snomed.org/snomed-ct-specifications/snomed-ct-editorial-guide/readme/authoring/domain-specific-modeling/body-structure.md).

# Body Structure

The 123037004 |Body structure (body structure)| subhierarchy includes both anatomical structures and morphologic abnormalities

<table><thead><tr><th width="257.80859375">Semantic tag</th><th>Example</th></tr></thead><tbody><tr><td>Body structure</td><td><ul><li>38033009 | Amputation stump (body structure) |</li><li>91134007 | Mitral valve structure (body structure) |</li></ul></td></tr><tr><td>Morphologic abnormality</td><td><ul><li>189955008 | Biopsy wound (morphologic abnormality) |</li><li>31470003 | Adenosarcoma (morphologic abnormality) |</li></ul></td></tr><tr><td>Cell</td><td><ul><li>250293008 | Agranular white blood cell (cell) |</li><li>57184004 | T lymphocyte (cell) |</li></ul></td></tr><tr><td>Cell structure</td><td><ul><li>4897009 | Cell membrane, prokaryotic (cell structure) |</li><li>362293000 | Entire axon (cell structure) |</li></ul></td></tr></tbody></table>

The body structure domain includes anatomical structures, as well as morphologic abnormalities, as follows:

* Body structure (body structure)
  * Anatomical or acquired body structure (body structure)
  * Anatomical organizational pattern (body structure)
  * Anatomical site notations for tumor staging (body structure)
  * Body structure, altered from its original anatomical structure (morphologic abnormality)
  * Nonspecific site (body structure)
  * Normal anatomy (body structure)
  * Topography not assigned (body structure)
  * Topography unknown (body structure)

{% hint style="warning" %}
**Tumor staging**

Concepts under 258331007 | Anatomical site notations for tumor staging (body structure) | require review and reallocation.
{% endhint %}

## Topics in this section

{% content-ref url="/pages/lYNgg4G6lsT00gJosd3I" %}
[Body Structure Attributes Summary](/snomed-ct-specifications/snomed-ct-editorial-guide/readme/authoring/domain-specific-modeling/body-structure/body-structure-attributes-summary.md)
{% endcontent-ref %}

{% content-ref url="/pages/KvA70lW0SNh37A9qbVLg" %}
[Anatomical Concept Model](/snomed-ct-specifications/snomed-ct-editorial-guide/readme/authoring/domain-specific-modeling/body-structure/anatomical-concept-model.md)
{% endcontent-ref %}

{% content-ref url="/pages/Z0b2Gff1SGXuS4HsrCbc" %}
[Anatomical Structure Naming Conventions](/snomed-ct-specifications/snomed-ct-editorial-guide/readme/authoring/domain-specific-modeling/body-structure/index.md)
{% endcontent-ref %}

{% content-ref url="/pages/K5xSvUQhRVVN015ekYAQ" %}
[Anatomical Structure Modeling](/snomed-ct-specifications/snomed-ct-editorial-guide/readme/authoring/domain-specific-modeling/body-structure/index-1.md)
{% endcontent-ref %}

{% content-ref url="/pages/xXMJOsYH2ukFEc7sirx2" %}
[Morphologic Abnormality Modeling](/snomed-ct-specifications/snomed-ct-editorial-guide/readme/authoring/domain-specific-modeling/body-structure/index-2.md)
{% endcontent-ref %}

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