In-Depth Guide: Advanced Rectal Cancer Treatment

Advanced Rectal Cancer occurs when cancer develops in the rectum and spreads beyond the rectal wall or to other organs. It is categorized into two main types:

Types of Advanced Rectal Cancer

1. Locally Advanced Rectal Cancer
   • Tumor invades through the rectal wall.
   • May spread to nearby lymph nodes but not to distant organs.
   • Classified as Stage II or Stage III under the TNM staging system.
2. Metastatic Rectal Cancer
   • Cancer has spread to other organs, such as the liver, lungs, or peritoneum.
   • Classified as Stage IV.

Symptoms of Advanced Rectal Cancer

• Alternating constipation and diarrhea
• Blood or mucus in stool
• Abdominal pain or pressure around the rectum
• Unexplained weight loss
• Fatigue and weakness
• Bloating or feeling full

Treatment Options for Advanced Rectal Cancer

Treatment depends on the stage of the disease and the patient's health. The treatment methods used include:

1. Surgery

• Total Mesorectal Excision (TME): Removal of the rectum and surrounding tissues.
• Abdominoperineal Resection (APR): Removal of the rectum and anus for low-lying tumors.

2. Chemotherapy

• Used to kill or slow cancer growth, especially in Stage III and IV.
• Examples of Drugs: FOLFOX (5-FU, Leucovorin, Oxaliplatin), CAPOX (Capecitabine, Oxaliplatin)

3. Radiation Therapy

• Often combined with chemotherapy (Neoadjuvant Therapy) before surgery.
• Shrinks the tumor and lowers the risk of recurrence.

4. Targeted Therapy

• Used for metastatic cases.
  • Bevacizumab (Avastin): Inhibits new blood vessel formation.
  • Cetuximab, Panitumumab: For patients without KRAS gene mutations.

5. Immunotherapy

• For patients with MSI-High or dMMR genetic mutations.
• Drugs: Pembrolizumab (Keytruda) Nivolumab (Opdivo)