Emergency Surgical Outcomes in Colorectal Cancer

Emergency presentations of colorectal cancer, characterised by intestinal obstruction, perforation or acute bleeding, represent up to 30 per cent of cases. These scenarios often necessitate unplanned surgical intervention under suboptimal conditions, increasing perioperative morbidity and mortality. Tumours discovered in this context tend to exhibit more aggressive histopathological features and are diagnosed at advanced stages, with vascular and perineural invasion more common than in elective resections. Outcomes may vary according to the nature of the complication: perforation typically carries a higher risk of postoperative complications and poorer disease-free survival, whereas obstruction may lead to staged procedures and prolonged hospital stay. The balance between adhering to oncological principles and managing urgent clinical demands poses a persistent challenge. Global data underline the importance of preoperative screening, timely referral and specialist input, all of which can reduce rates of emergency surgery and improve long-term survival.

Research from Nature Portfolio

A comprehensive review of elective versus emergency presentations has systematically quantified tumour and host factors that distinguish these groups. Emergency cases show significantly higher odds of advanced overall stage and subclassifications within the TNM system, along with increased rates of lymphovascular and perineural invasion. Patient factors such as higher anaesthetic risk scores and minority ethnicity also correlate with emergency diagnosis. This synthesis highlights the multifactorial determinants of unplanned surgical admission and underscores the potential for targeted preventive strategies and tailored perioperative care pathways to mitigate poor outcomes.

Emergency Surgical Outcomes in Colorectal Cancer publication trend

The graph below shows the total number of articles in emergency surgical outcomes in colorectal cancer across all publications each year (not limited to Nature Index journals).

Technical terms

Emergency presentation: Acute onset of symptoms such as obstruction, perforation or bleeding leading to unplanned admission.

Obstruction: Blockage of the intestinal lumen by tumour, causing pain, distension and vomiting.

Perforation: Full-thickness breach of the bowel wall, allowing spillage of contents into the peritoneal cavity.

TNM staging: System classifying tumour size and invasion (T), regional lymph node involvement (N) and distant metastasis (M).

Lymphovascular invasion: Presence of tumour cells within lymphatic channels or blood vessels, indicating higher risk of spread.

Perineural invasion: Tumour infiltration around nerves, linked to more aggressive disease and poorer prognosis.

ASA score: Classification by the American Society of Anaesthesiologists assessing preoperative physical status and operative risk.

References

1. Clinicopathological Analysis of Complicated Colorectal Cancer: A Five-Year Retrospective Study from a Single Surgery Unit. Diagnostics (2023).
2. Time Trends in the Diagnosis of Colorectal Cancer With Obstruction, Perforation, and Emergency Admission After the Introduction of Population-Based Organized Screening. JAMA Network Open (2020).
3. Can we respect the principles of oncologic resection in an emergency surgery to treat colon cancer?. World Journal of Emergency Surgery (2015).
4. Outcome of colon cancer initially presenting as colon perforation and obstruction. World Journal of Surgical Oncology (2017).
5. Determinants of emergency presentation in patients with colorectal cancer: a systematic review and meta-analysis. Scientific Reports (2022).