Omentum

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The omentum is a much neglected structure. It is often removed in the context of gynecologic oncology procedure.

Normal omentum

Microscopic

Features:

  • Fibroadipose tissue covered by mesothelium.

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OMENTUM, OMENTECOMY: 
- FIBROADIPOSE TISSUE COVERED BY MESOTHELIUM -- CONSISTENT WITH OMENTUM. 
- NEGATIVE FOR MALIGNANCY.

Radiology

  • "Omental cake" refers to a thickened omentum.
    • The finding is non-specific - etiologies:

Grossing

  • There is no widely accepted evidence-based standard; thus, the protocol differs from centre to centre.
    • In the context of a gynecologic malignancy/suspected gynecologic malignancy:
      • It is reasonable to put through six (standard) blocks if there is no gross evidence of disease.
      • One study suggests 3-5 blocks is enough if there is no macroscopic disease, and one block enough if there is macroscopic disease.[2]

Pathology of the omentum

Benign

Mesothelial:

Other:

Malignant

Primary:

Metastatic:

See also

References

  1. Roche CJ, O'Keeffe DP, Lee WK, Duddalwar VA, Torreggiani WC, Curtis JM (2002). "Selections from the buffet of food signs in radiology". Radiographics 22 (6): 1369–84. doi:10.1148/rg.226025521. PMID 12432108. http://radiographics.rsnajnls.org/cgi/pmidlookup?view=long&pmid=12432108.
  2. Usubütün, A.; Ozseker, HS.; Himmetoglu, C.; Balci, S.; Ayhan, A. (Oct 2007). "Omentectomy for gynecologic cancer: how much sampling is adequate for microscopic examination?". Arch Pathol Lab Med 131 (10): 1578-81. doi:10.1043/1543-2165(2007)131[1578:OFGCHM]2.0.CO;2. PMID 17922596.
  3. Garbin, O.; Hummel, M.; Diana, M.; Wattiez, A.. "Solitary fibrous tumor of the great omentum.". J Minim Invasive Gynecol 18 (6): 694-5. doi:10.1016/j.jmig.2011.01.013. PMID 22024257.