A primary adenosquamous gallbladder carcinoma with sarcomatoid features

A 65-year-old female was admitted to our hospital complaining of abdominal pain for the past month. A physical examination revealed mild right upper quadrant tenderness without rebound pain and no palpable abdominal hepatomegaly or mass. Her laboratory results showed mildly impaired liver function: AST 51 U/L (normal range <34 U/L), ALT 49 U/L (normal range <34 U/L), and C-reactive protein 16.5 mg/L (normal range <10 mg/L).