A 33-year-old primiparous woman presented with reduced fetal movements during the gestational age of 33 weeks. Ultrasonography showed a heterogeneous and hypoechoic placental lesion measuring 8 cm. A week later, the patient delivered a live healthy male neonate. Histological examination of the placental mass established the diagnosis of placental chorioangioma.

Hepatic epithelioid angiomyolipomas are uncommon mesenchymal neoplasms. They are difficult to diagnose by imaging, especially when the fatty component is scant or absent. The gold standard for the diagnosis is histologic examination coupled with an immunohistochemical study. Positive HMB-45 immunostaining of the myoid cells is a major diagnostic feature.

Carcinosarcomas are aggressive biphasic neoplasms composed of high-grade, malignant, epithelial, and mesenchymal elements. They usually occur in the uterus and rarely involve the ovaries. Only 10% of them are bilateral. Their diagnosis relies on histological examination coupled with immunohistochemistry.

Mixed fibrolamellar hepatocellular carcinoma is a rare liver tumor defined by the presence of both pure fibrolamellar hepatocellular carcinoma and conventional hepatocellular components. It represents up to 25% of cases of fibrolamellar hepatocellular carcinoma, and has been associated with a worse prognosis.

Mucinous cystic neoplasm of the liver is a rare slow-growing lesion accounting for less than 5% of all hepatic cystic neoplasms. Differential diagnosis from other cystic lesions remains challenging despite progress achieved in the radiological modalities. Only histopathological examination of the surgical specimen establishes with certainty the diagnosis.