[Two Cases of Primary Hepatic PEComa Treated with Laparoscopic Liver Resection]

We report 2 cases of primary hepatic perivascular epithelioid cell tumor(PEComa), treated with laparoscopic partial liver resection. Case 1: A 44-year-old woman who presented with abdominal pain. Abdominal dynamic contrast-enhanced computed tomography(Dy-CT)revealed a low-enhancing liver tumor in both the arterial and venous phases. She underwent laparoscopic partial liver resection of segment 5 for diagnostic and therapeutic purposes. Histopathological examination confirmed the diagnosis of PEComa. Case 2: A 40-year-old woman was found to have a hepatic tumor was during an annual health checkup. Dy-CT demonstrated arterial-phase enhancement of the tumor with early visualization of the hepatic vein adjacent to the tumor. The tumor was preoperatively diagnosed as hepatocellular carcinoma, and laparoscopic partial liver resection of segment 3 was performed. Histopathological examination confirmed the diagnosis of PEComa. Preoperative diagnosis of hepatic PEComa remains challenging due to its rarity. However, early visualization of draining hepatic veins during the arterial-phase may aid in its diagnosis. Surgical resection is generally recommended, as PEComa may exhibit malignant potential in rare cases.