30th April 2024

A 50-year-old woman presents with a 6-month history of altered bowel habits, predominantly constipation, and occasional rectal bleeding.

A 50-year-old woman presents with a 6-month history of altered bowel habits, predominantly constipation, and occasional rectal bleeding. She has a family history of colorectal cancer in her father. On examination, she appears pale, and abdominal examination reveals no masses or tenderness. Digital rectal examination is unremarkable.

Vital signs: Normal temperature, pulse, and blood pressure.

Which investigation is most appropriate to confirm the diagnosis?