Diagnostic challenges and radiological insights of rare hepatic perivascular epithelioid cell tumor: A case report and review of the literature

Figure 4 Postoperative pathological findings. A: Hematoxylin-eosin staining. The tumor cells are polygonal with translucent cytoplasm containing uneven eosinophilic granules. Perinuclear eosinophilic condensation shows a clear appearance (black arrow). The nuclei are round or oval with a distinct nucleolus and sparse chromatin (white arrow); B and C: Immunohistochemical staining revealed positivity for HMB45 (B) and Melan-A (C), with increased expression in both the cytoplasm and nuclei of tumor cells compared to normal liver cells.