Investigations of Piles (Haemorrhoids) — Bailey & Love's Short Practice of Surgery, 28th Edition

1. Clinical assessment first

Bailey & Love emphasises that haemorrhoids are essentially a clinical diagnosis based on history (painless bleeding separate from the stool, prolapse, pruritus) and examination, but appropriate investigation is needed to (a) confirm the diagnosis and (b) exclude other, more serious causes of rectal bleeding - "exclusion of other causes of rectal bleeding, especially colorectal malignancy, is the first priority" (Bailey and Love's Short Practice of Surgery, p. 1452).

2. Key investigations

Digital Rectal Examination (DRE)

Internal haemorrhoids are usually not palpable (they are soft, venous, and collapse under examining pressure) unless thrombosed or very large. DRE is still done to exclude a rectal mass, fissure, fistula, or abscess and to assess sphincter tone.

Proctoscopy

The key confirmatory investigation. The text states: "Proctoscopy is particularly useful for assessing the presence of haemorrhoids" and allows detailed inspection of the anal canal and distal rectum. Internal haemorrhoids are seen bulging into the lumen at the classic 3, 7, and 11 o'clock positions (lithotomy position). Minor treatments (injection sclerotherapy, banding) can be performed through the same instrument at the time of examination.

Sigmoidoscopy (rigid or flexible)

Performed routinely alongside proctoscopy because "rectal pathology is [otherwise missed]" - it is used to exclude a more proximal rectal lesion (polyp, proctitis, tumour) that could account for the bleeding.

Colonoscopy / Flexible sigmoidoscopy + barium/CT colonography (as indicated)

Not needed for straightforward, typical haemorrhoidal bleeding in a young patient, but mandatory to exclude colorectal malignancy or inflammatory bowel disease when:
- age >40-50 years,
- change in bowel habit,
- iron-deficiency anaemia,
- family history of colorectal cancer,
- atypical bleeding pattern, or
- symptoms persist despite haemorrhoid treatment.

Examination Under Anaesthesia (EUA) with endoscopic visualisation

Bailey & Love specifically notes: "If there is any doubt about the diagnosis of haemorrhoids, examination under anaesthesia and/or endoscopic visualisation are necessary" - particularly before proceeding to haemorrhoidectomy.

Routine bloods

Full blood count if there is a history suggestive of significant chronic blood loss (bleeding from piles "is rarely sufficient to cause anaemia" - so anaemia should prompt a search for another/additional cause).

3. Summary table (as per text's framework)

Investigation	Purpose
DRE	Exclude mass/fissure/fistula; assess sphincter
Proctoscopy	Visualise and grade internal haemorrhoids; allows treatment in same sitting
Rigid/flexible sigmoidoscopy	Exclude proximal rectal pathology
Colonoscopy/CT colonography	Exclude colorectal malignancy in at-risk or atypical presentations
EUA + endoscopy	Diagnostic doubt, prior to haemorrhoidectomy
FBC	If bleeding is heavy/chronic or anaemia suspected

Recent evidence note

A 2024 systematic review and meta-analysis ("Is routine histopathological analysis of hemorrhoidectomy specimens necessary?", PMID: 38797982) examined whether excised haemorrhoidal tissue needs routine histopathology - relevant to the broader "investigation" pathway once a patient reaches surgery, since incidental malignancy in haemorrhoidectomy specimens is rare but not zero. This doesn't contradict Bailey & Love's core teaching but is a useful update on postoperative specimen work-up if that's part of what you're asking about. I did not find recent evidence contradicting the standard proctoscopy/sigmoidoscopy-based diagnostic pathway itself.

If you want, I can go deeper into grading (degrees of haemorrhoids), differential diagnosis on proctoscopy, or the treatment ladder (injection sclerotherapy, banding, haemorrhoidectomy) - let me know which angle you need next.

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