13Diseases of the digestive system Diseases of anal canal Haemorrhoids or perianal venous conditions
DB61
category
Perianal venous thrombosis
Definition Extremely painful cherry like lesions under the perianal skin containing clotted blood have been attributed to rupture of a blood vessel with haematoma. However, histology confirmed that these lesions are thrombi lying within the thin-walled vessels of the external anal plexus.
Inclusions
Perianal haematoma (nontraumatic) perianal thrombosis Also indexed as
Perianal haematoma (nontraumatic) Perianal venous thrombosis anal thrombosis perianal thrombosis thrombosed external haemorrhoid thrombosed external pile
Nearby in Haemorrhoids or perianal venous conditions
International Classification of Diseases, Eleventh Revision (ICD-11), World Health Organization (WHO) 2019/2021, https://icd.who.int/browse11. Licensed under Creative Commons Attribution-NoDerivatives 3.0 IGO (CC BY-ND 3.0 IGO).
Release 2026-01.
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This page reproduces WHO classification content for reference. It is not
medical advice and must not be used to diagnose or treat. For coding
decisions, consult the official release and your national coding guidelines.
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