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 60-year-old man comes to the physician because of a 2-day history of blood in his urine, lower abdominal pain, and a burning sensation while micturating. Five months ago, he was diagnosed with high-grade non-Hodgkin lymphoma and a deep vein thrombosis of his right popliteal vein. His medications include polychemotherapy every 3 weeks and a daily subcutaneous dose of low molecular weight heparin. The last cycle of chemotherapy was 2 weeks ago. His temperature is 37°C (98.6°F), pulse is 94/min, and blood pressure is 110/76 mm Hg. Examination shows bilateral axillary and inguinal lymphadenopathy, hepatosplenomegaly, and mild suprapubic tenderness. Laboratory studies show:
Hemoglobin 10.2 g/dL
Leukocytes 4,300/mm3
Platelet count 145,000/mm3
Partial thromboplastin time 55 seconds
Prothrombin time 11 seconds (INR=1)
Urine
RBCs 50–55/hpf
RBC casts negative
WBCs 7/hpf
Epithelial cells 5/hpf
Bacteria occasional
Administration of which of the following is most likely to have prevented this patient's current condition?"
assistant
Mercaptoethane sulfonate