Catalog
Perianal venous thrombosis
Link to WHO Definition
Perianal venous thrombosis – http://id.who.int/icd/entity/287994615
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.