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 thrombosis
• Perianal haematoma (nontraumatic)

Index Terms