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 42-year-old woman presents to her primary care physician with fatigue. She reports that over the past 2 months, she has felt increasingly tired despite no changes in her diet or exercise. Her past medical history is notable for obesity, seasonal allergies, and hypertension. She takes ranitidine as needed and hydrochlorothiazide daily. Her family history is notable for colorectal cancer in her mother and maternal uncle, endometrial cancer in her maternal aunt, and ovarian cancer in her maternal grandmother. Her temperature is 98.8°F (37.1°C), blood pressure is 132/71 mmHg, pulse is 89/min, and respirations are 17/min. On exam, she has conjunctival pallor. A stool sample is hemoccult positive. A colonoscopy reveals a fungating hemorrhagic mass in the ascending colon. Which of the following processes is likely impaired in this patient?
assistant
Mismatch repair