A 32-year-old woman presented with acute right upper quadrant pain. A computerized tomogram disclosed a 15.5 cm multicystic mass in the subhepatic space adherent to the liver. A hepatic hydatid cyst and metastasis from an ovarian carcinoma were considered as possible diagnoses. Surgical removal led to a diagnosis of an endometrioid cystadenofibroma in conjunction with endometriosis. To our knowledge, this is the first report of an endometrioid cystadenofibroma arising in juxtahepatic endometriosis.
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