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Surgical Case Reports
Fig. 4 | Surgical Case Reports

Fig. 4

From: Unclassified hepatocellular adenoma with histological brown pigment deposition and serum PIVKA-II level elevation: a case report

Fig. 4

Histopathological findings. a The tumor consisted of two to three layers of hepatocyte (H&E stain, LPF). b The hepatocytes had poor atypia (H&E stain, HPF). c Abnormal muscular vessels developed in the tumor (H&E stain, HPF). d Brown pigment deposition in the hepatocytes (white arrow; H&E stain, HPF). e The pigment was stained black (Fontana-Masson stain). H&E hematoxylin-eosin, LPF low-power field, HPF high-power field

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