title: The varied ultrasonic character of gallbladder tumor.
mesh_terms: D000230:Adenocarcinoma / Q000175:diagnosis*; D000368:Aged; D005260:Female; D005706:Gallbladder Neoplasms / Q000175:diagnosis*; D006801:Humans; D008297:Male; D008875:Middle Aged; D014463:Ultrasonography