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Serous Cystadenoma

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Benign serous ovarian tumor (serous cystadenoma) comprises approximately 60% of all serous ovarian tumors. It is most frequently encountered in the 4th and 5th decades of life. About 15-20% of cases are bilateral. It may be associated with endometriosis. Most tumors are asymptomatic until they reach large size. Symptoms include abdominal discomfort and chronic pelvic pain. Rare tumors may undergo torsion and cause acute abdominal pain.

Grossly, they consist of thin-walled unilocular cyst usually filled with clear serous fluid. Small papillary excrescences may be present in the cyst wall inside or on the surface. Image courtesy of Dr. Jean-Christophe Fournet, Paris, France; humpath.com; Used with permission

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