OpiCalc

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Bristol Stool Chart CR-POSSUM Hinchey Classification LARS Score MSK Colon Cancer Recurrence Nomogram Surgical Apgar Score Wexner Score

OpiCalc

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Recent Journal Updates

CancerJun 24, 2026

Postoperative anlotinib plus radiotherapy in patients with newly diagnosed, unmethylated O6‐methylguanine–DNA methyltransferase glioblastoma: A single‐arm, phase 2 study

Clinical Context

We think this has broad domain relevance to CR-POSSUM.

JAMAJun 23, 2026

Metabolic Bariatric Surgery Declines as GLP-1 Drug Use Increases

Clinical Context

We think this has broad domain relevance to CR-POSSUM.

CancerJun 22, 2026

Demographic, birth, parental characteristics, and the risk of early‐onset colorectal cancer: A population‐based nested case‐control study in California

Clinical Context

We think this has broad domain relevance to CR-POSSUM.

CR-POSSUM

Colorectal Physiological and Operative Severity Score for the enUmeration of Mortality

Physiological Score (PS)

Age (Years)

Cardiac Failure

Systolic BP (mmHg)

Pulse (bpm)

Urea (mmol/L)

Hemoglobin (g/dL)

Operative Severity Score (OSS)

Operative Severity

Peritoneal Soiling

Operative Urgency

Cancer Staging

Ready for Assessment

Input physiologic and operative data to calculate CR-POSSUM risk.

Guidelines & Evidence

Verified

Last Review: 2026

When to Use

When to Use

Predicting immediate (in-hospital) and 30-day mortality in patients undergoing colorectal cancer resection.

Guiding postoperative resource allocation (e.g., immediate admission to HDU/ICU vs. general ward) following major or complex colorectal surgery.

Quality improvement and clinical audit, comparing observed vs expected operative mortality.

Last Comprehensive Review: 2026

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