Omentum

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

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, one centre I worked at puts 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.

Pathology of the omentum

Benign

Mesothelial:

• Benign multicystic mesothelioma.
• Adenomatoid tumour.
• Solitary fibrous tumour.

Other:

• Peritoneal inclusion cyst.
• Endometriosis.
• Endosalpingiosis.

Malignant

Primary:

• Malignant mesothelioma.
• Primary peritoneal serous carcinoma.

Metastatic:

• Serous carcinoma of the ovary.

See also

• Gynecologic pathology.