Review Question - QID 109569

A 27-year-old woman is brought by ambulance to the emergency department after being hit by a car while walking on the sidewalk. She is conscious and denies any pain, bleeding, or memory loss. The patient states that she is a veterinarian for farm animals, primarily horses. Her temperature is 98.7°F (37°C), blood pressure is 120/70 mmHg, pulse is 90/min, and respirations are 15/min. A physical exam reveals a small bruise over her right elbow and right upper quadrant as well as some scrapes on her right lateral thigh. Radiography of her right arm, hip, and knee are unremarkable. Abdominal ultrasound reveals no free fluid, but demonstrates a 6 x 4 cm cystic mass in the right hepatic lobe seen in Figure A. Computed tomography confirmed the cystic mass size and location. Her complete blood count is shown below:

Leukocyte count and differential:
Leukocyte count: 13,000 /mm^3
Segmented neutrophils: 60%
Bands: 0 %
Eosinophils: 10%
Basophils: 6%
Lymphocytes: 18%
Monocytes: 6%

Hemoglobin: 14 g/dL
Platelet count: 160,000 /mm^3

What is the most likely diagnosis?