K64.9 — Haemorrhoids
Denied34F · investigation — Colonoscopy
Insurer Rationale
At age 34, bright red rectal bleeding is most consistent with haemorrhoids. Initial conservative treatment with fibre, topical therapy, and outpatient review is appropriate before invasive endoscopy.
Clinical Contradiction
Insurer states
“The most likely diagnosis is haemorrhoids; conservative management recommended”
Clinical evidence shows
Change in bowel habit plus weight loss are red-flag features that mandate colonoscopy to exclude colorectal malignancy
Patient risk
Delayed colorectal cancer diagnosis significantly worsens staging and survival
Reasoning Chain
Rectal bleeding is shared between haemorrhoids and colorectal cancer, but change in bowel habit, weight loss, and anaemia move this patient across the cancer threshold. Colonoscopy is the graph-backed discriminator. Delaying it prolongs diagnostic uncertainty in a potentially progressive malignancy.
Reasoning Chain
Findings
Rectal bleeding, Change in bowel habit, Unintentional weight loss, Iron-deficiency anaemia, Intermittent abdominal discomfort
Differential
Haemorrhoids (probable on exam) vs Colorectal Cancer (not excluded)
Shared findings
Bleeding, Bleeding per rectum, Rectal bleeding
Discriminating investigation — DENIED
Colonoscopy
Directly visualises and biopsies colorectal neoplasia when red flags accompany bleeding
Verdict
Denial is clinically unsafe. Conservative haemorrhoid treatment does not answer the cancer question once systemic red flags are present.
Clinical Evidence
NICE Guideline NG12 — Suspected cancer: recognition and referral
Lower gastrointestinal cancer
Weight loss, altered bowel habit, and iron-deficiency anaemia escalate rectal bleeding to urgent colorectal investigation.
BSG/ACPGBI Guidance on Lower GI Symptoms (2024)
Urgent investigation pathways
Colonoscopy is indicated when rectal bleeding is accompanied by change in bowel habit or unexplained anaemia.