C18.5

Clinical Causes: Genetic factors, including a family history of colorectal cancer Chronic inflammatory diseases of the colon, such as inflammatory bowel disease (Crohn's disease or ulcerative colitis) Lifestyle choices, such as a diet high in red and processed meats, low in fiber, and lack of physical activity Age, with increased risk after the age of 50 Smoking and excessive alcohol consumption Certain inherited syndromes like Lynch syndrome or familial adenomatous polyposis (FAP) Previous history of colorectal polyps or cancer

Key Symptoms: Changes in bowel habits, such as diarrhea or constipation Presence of blood in stool or noticeable dark stools Unexplained weight loss Persistent abdominal pain or discomfort A feeling of incomplete bowel emptying Fatigue and weakness, which may be related to anemia Abdominal bloating or a palpable mass in some cases

Diagnosis Path: Diagnosing a malignant neoplasm of the splenic flexure involves several steps: - **Medical history and physical examination** to assess symptoms and risk factors. - **Colonoscopy**, allowing direct visualization of the colon and collection of tissue samples (biopsies) for analysis. - **Imaging tests**, such as CT scans or MRI, to determine the extent of the tumor and check for spread. - **Laboratory tests**, including blood tests to evaluate overall health and look for anemia indicating bleeding. - **Staging**, which involves additional scans and procedures to determine the cancer’s size, stage, and spread, guiding treatment options.

Treatment Protocols: Treatment strategies for malignant neoplasm of the splenic flexure typically include: - **Surgical removal** of the tumor, often involving resection of the affected segment of the colon, with removal of nearby lymph nodes to prevent spread. - **Chemotherapy**, used before or after surgery to kill remaining cancer cells and reduce recurrence risk. - **Radiation therapy**, although less common for colon cancers, may be considered in certain cases. - **Targeted therapy** and immunotherapy are emerging options for specific genetic profiles of colorectal cancers. - **Supportive care**, including nutritional support and management of side effects, plays a vital role throughout treatment. The appropriate approach depends on the stage of the cancer, overall health, and personal circumstances, making it essential for patients to discuss options thoroughly with their healthcare team.