Skip to main content

Assoc. Prof. Cengiz Dibekoğlu, MD

General Surgeon · Laparoscopic · Robotic · Oncologic Surgery

Oncologic surgery

Colon Cancer

Diagnosis, surgery, and multidisciplinary care

When colon cancer is found early, outcomes are often very good. Surgery remains central for most localized disease.

Colon cancer often starts as an adenomatous polyp; colonoscopy both prevents and catches it early. The question I hear most often is whether rectal bleeding is “just hemorrhoids” — often it is not, and endoscopy settles it regardless of age. I do not discuss a one-size-fits-all plan before staging and MMR/MSI results are back. For localized disease I plan open, laparoscopic, or robotic colectomy with proper lymph-node clearance; when nodes or pathology warrant it, we add chemotherapy at tumor board.

Colon cancer · surgery, systemic therapy, multidisciplinary care

Educational schematic. Some structures may be simplified or emphasized for clarity; not an exact anatomical depiction.

© Cengiz Dibekoğlu — illustrative; not for unauthorized use

Figure summary

  • Hero figure: colon cancer pathway spanning surgery, systemic therapy, and multidisciplinary care.
  • Related educational figures expand staging, resection, and liver-metastasis concepts.

Educational figures

Tap a figure to enlarge. These English illustrations mirror the Turkish hub gallery for this condition.

  • Colon anatomy

    Educational schematic. Some structures may be simplified or emphasized for clarity; not an exact anatomical depiction.

    © Cengiz Dibekoğlu — illustrative; not for unauthorized use

  • Tumor & screening

    Educational schematic. Some structures may be simplified or emphasized for clarity; not an exact anatomical depiction.

    © Cengiz Dibekoğlu — illustrative; not for unauthorized use

  • Lymph nodes

    Educational schematic. Some structures may be simplified or emphasized for clarity; not an exact anatomical depiction.

    © Cengiz Dibekoğlu — illustrative; not for unauthorized use

  • Robotic colectomy

    Educational schematic. Some structures may be simplified or emphasized for clarity; not an exact anatomical depiction.

    © Cengiz Dibekoğlu — illustrative; not for unauthorized use

  • Screening can prevent cancer

    Removing adenomatous polyps lowers future cancer risk.

  • Surgery is often central

    Oncologic resection with lymph-node clearance when disease is localized.

  • Three ways to operate, one cancer goal

    Open, laparoscopic, and robotic colectomy share the same oncologic rules.

  • Tumor board

    Decisions about chemotherapy and metastases are made with a tumor board.

What to know

  • MMR / MSI at diagnosis

    Key note inside
    Note: This result can change both systemic options and hereditary counseling.

    MMR/MSI testing is recommended at diagnosis for colorectal cancer — not only in younger patients. The result can change both systemic options and hereditary counseling.

  • Metastatic biomarkers

    In metastatic disease, RAS/BRAF and selected HER2/NTRK testing guide targeted therapy. The goal is the right test for the clinical question — not every test available.

  • Surgical routes

    Open, laparoscopic, or robotic surgery is chosen by anatomy, urgency, prior operations, and surgical experience — not by the device name. Oncologic margins and node harvest remain the standard regardless of open or minimally invasive access.

  • Warning symptoms

    Key note inside

    Persistent rectal bleeding, unexplained iron-deficiency anemia, a sustained change in bowel habits, or unexplained weight loss warrants evaluation regardless of age. For average-risk adults without symptoms, U.S. screening guidelines begin at age 45.

  • After resection

    Early mobilization, pain control, and staged diet support recovery. Pathology and the tumor board then decide on extra treatment or surveillance.

What happens next

What patients notice — and which warning signs need urgent care

Oncologic surgery13 chapters

Patient education videos

From Dr. Dibekoğlu’s official YouTube channel.

All videos →

  • Are colon polyps dangerous?

  • Common misconceptions about colon cancer

  • Colon cancer warning signs — do not ignore

  • Habits that may raise colon cancer risk

  • Are large-bowel polyps dangerous?

Evidence

Scientific sources

Show sources · 3

Patient education on this page is informed by current international guidelines and clinical practice. Sources do not replace individualized medical decisions.

  1. 1. Metastatic colorectal cancer: ESMO Clinical Practice Guideline for diagnosis, treatment and follow-upEuropean Society for Medical Oncology (ESMO) · 2023 · DOI: 10.1016/j.annonc.2022.10.003Open source →
  2. 2. NCCN Clinical Practice Guidelines in Oncology: Colon CancerNational Comprehensive Cancer Network (NCCN) · Current versionOpen source →
  3. 3. ASCRS clinical practice guidelines libraryAmerican Society of Colon & Rectal Surgeons (ASCRS) · Guideline libraryOpen source →

Last reviewed: 21 August 2026. Links go to publisher pages.

Appointment / info

Bring pathology, colonoscopy reports, and imaging discs. Complete records often make a tumor-board second opinion possible in a single visit.

+90 542 725 50 70WhatsAppTumor boardFull Turkish hub →

This page is for education. It is not medical advice and does not replace a visit with your physician.

Medical editor: Assoc. Prof. Cengiz Dibekoğlu, MD · English patient-education hub.

AppointmentWhatsAppMessageTumor boardRequest