system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 36-year-old man is brought to the emergency department for right upper quadrant abdominal pain that began 3 days ago. The pain is nonradiating and has no alleviating or exacerbating factors. He denies any nausea or vomiting. He immigrated from Mexico 6 months ago and currently works at a pet shop. He has been healthy except for 1 week of bloody diarrhea 5 months ago. He is 182 cm (5 ft 11 in) tall and weighs 120 kg (264 lb); BMI is 36 kg/m2. His temperature is 101.8°F (38.8°C), pulse is 85/min, respirations are 14/min, and blood pressure is 120/75 mm Hg. Lungs are clear to auscultation. He has tenderness to palpation in the right upper quadrant. Laboratory studies show:
Hemoglobin 11.7 g/dL3
Leukocyte Count 14,000/mm
Segmented neutrophils 74%
Eosinophils 2%
Lymphocytes 17%
Monocytes 7%
Platelet count 140,000/mm3
Serum
Na+ 139 mEq/L
Cl- 101 mEq/L
K+ 4.4 mEq/L
HCO3- 25 mEq/L
Urea nitrogen 8 mg/dL
Creatinine 1.6 mg/dL
Total bilirubin 0.4 mg/dL
AST 76 U/L
ALT 80 U/L
Alkaline phosphatase 103 U/L
Ultrasonography of the abdomen shows a 4-cm round, hypoechoic lesion in the right lobe of the liver with low-level internal echoes. Which of the following is the most likely diagnosis?"
assistant
Amebiasis