Unexplained Anemia and Hematochezia in a 68-Year-Old Male

Elias Montgomery, a 68-year-old male, presents with a several-week history of intermittent hematochezia. He reports noticing bright red blood on toilet paper and occasionally mixed within his stool, which he describes as maroon in color. The bleeding episodes are usually painless but have increased in frequency over the past two weeks. He denies any associated abdominal pain, cramping, or tenesmus. He also reports feeling progressively more fatigued, with decreased exercise tolerance and occasional dizziness, especially when standing. Elias notes that he has not experienced melena or black stools. He mentions that the bleeding is not related to straining or bowel movements and has not been associated with any recent changes in bowel habits such as diarrhea or constipation. He denies any recent trauma or rectal trauma. Over the past month, he has felt increasingly tired and short of breath on exertion, which he attributes to his anemia. Elias has not experienced fever, chills, or night sweats. He reports no weight loss or appetite changes but admits to feeling generally unwell and worried about his symptoms. He has a history of hypertension and type 2 diabetes but no prior gastrointestinal issues or known bleeding disorders. He has been taking apixaban for atrial fibrillation for the past year. He states that he first noticed the bleeding about six weeks ago, initially infrequent and light, but it has become more persistent and heavier recently. He has not tried any over-the-counter remedies or changed his diet. Elias denies any recent travel, infectious symptoms, or other systemic complaints. He is concerned about the possibility of a serious underlying condition, especially given his age and the pattern of his symptoms.