Intrahepatic endometriosis as differential diagnosis: Case report and literature review

Figure 1 Radiographic images of the central liver cyst. Magnetic resonance imaging (MRI) demonstrated a well-defined lobulated cystic lesion without enhancement after administration of liver-specific contrast material (gadoxetic acid) in the arterial, venous or delayed phase. A: MRI, T2, coronary reconstruction; B: MRI, T1, transversal; C: Contrast-enhanced computed tomography scan, transversal.

Figure 2 Immunohistochemistry of the cyst. A: Cyst and normal liver tissue in HE staining, × 100; B: Immunohistochemistry for CK7, an epithelial marker, × 100. The intrahepatic vessels (arrows, endothelium) and the cystic wall (arrowheads) are indicated; C and D: Estrogen receptor and progesterone receptor staining of the cystic wall (respectively), × 100. Arrows indicate positive cells.