Smooth muscle tumor

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Author: Mikael Häggström [notes 1]

Smooth muscle tumor (in this case leiomyoma).

Gross processing

Gross examination

Examine and describe:[1]

  • Location
  • Number of tumors, if multiple
  • Size
  • Demarcation


In case of hysterectomy, submit pieces from all smooth muscle tumors >5 cm in diameter.[1]

Submit any macroscopically abnormal parts of the tumors (hemorrhagic, necrotic, brittle or softening areas, and areas with blurry delimitation).[1]

Microscopic examination

Distinguish leiomyoma (benign) from leiomyosarcoma (malignant).

Further information: Evaluation of tumors


  1. For a full list of contributors, see article history. Creators of images are attributed at the image description pages, seen by clicking on the images. See Patholines:Authorship for details.


  1. 1.0 1.1 1.2 Monica Dahlgren, Janne Malina, Anna Måsbäck, Otto Ljungberg. Stora utskärningen. KVAST (Swedish Society of Pathology). Retrieved on 2019-09-26.