Difference between revisions of "Omentum"
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''' | The '''omentum''' is a much neglected structure. It is often removed in the context of [[gynecologic pathology|gynecologic oncology]] procedure. | ||
==Normal omentum== | |||
===Microscopic=== | |||
Features: | |||
*Fibroadipose tissue covered by mesothelium. | |||
===Sign out=== | |||
<pre> | |||
OMENTUM, OMENTECOMY: | |||
- FIBROADIPOSE TISSUE COVERED BY MESOTHELIUM -- CONSISTENT WITH OMENTUM. | |||
- NEGATIVE FOR MALIGNANCY. | |||
</pre> | |||
==Radiology== | |||
*"Omental cake" refers to a thickened omentum. | |||
**The finding is non-specific - etiologies: | |||
***Metastatic tumours: stomach, ovary and colon. | |||
***Infection: [[tuberculous]] [[peritonitis]].<ref name=pmid12432108>{{cite journal |author=Roche CJ, O'Keeffe DP, Lee WK, Duddalwar VA, Torreggiani WC, Curtis JM |title=Selections from the buffet of food signs in radiology |journal=Radiographics |volume=22 |issue=6 |pages=1369–84 |year=2002 |pmid=12432108 |doi= 10.1148/rg.226025521|url=http://radiographics.rsnajnls.org/cgi/pmidlookup?view=long&pmid=12432108}}</ref> | |||
==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.<ref name=pmid17922596>{{Cite journal | last1 = Usubütün | first1 = A. | last2 = Ozseker | first2 = HS. | last3 = Himmetoglu | first3 = C. | last4 = Balci | first4 = S. | last5 = Ayhan | first5 = A. | title = Omentectomy for gynecologic cancer: how much sampling is adequate for microscopic examination? | journal = Arch Pathol Lab Med | volume = 131 | issue = 10 | pages = 1578-81 | month = Oct | year = 2007 | doi = 10.1043/1543-2165(2007)131[1578:OFGCHM]2.0.CO;2 | PMID = 17922596 }}</ref> | |||
==Pathology of the omentum== | ==Pathology of the omentum== | ||
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*[[Endometriosis]]. | *[[Endometriosis]]. | ||
*[[Endosalpingiosis]]. | *[[Endosalpingiosis]]. | ||
*[[Hernia sac|Omental hernia]]. | |||
===Malignant=== | ===Malignant=== | ||
Primary: | Primary: | ||
*[[Malignant mesothelioma]]. | *[[Malignant mesothelioma]]. | ||
*Primary peritoneal serous carcinoma. | *[[Primary peritoneal serous carcinoma]]. | ||
*Serous tumour of low malignant potential. | |||
*[[Sarcoma]]. | |||
*Other Muellerian tumours. (???) | |||
Metastatic: | Metastatic: | ||
| Line 24: | Line 52: | ||
==See also== | ==See also== | ||
*[[Gynecologic pathology]]. | *[[Gynecologic pathology]]. | ||
*[[Peritoneum]]. | |||
==References== | ==References== | ||
Latest revision as of 02:52, 29 May 2015
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.
Sign out
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:
- Metastatic tumours: stomach, ovary and colon.
- Infection: tuberculous peritonitis.[1]
- 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]
- In the context of a gynecologic malignancy/suspected gynecologic malignancy:
Pathology of the omentum
Benign
Mesothelial:
Other:
Malignant
Primary:
- Malignant mesothelioma.
- Primary peritoneal serous carcinoma.
- Serous tumour of low malignant potential.
- Sarcoma.
- Other Muellerian tumours. (???)
Metastatic:
See also
References
- ↑ 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.
- ↑ 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.
- ↑ 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.