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Previous work has used poorly defined terminology to identify patients with material in the deep venous system following ablation, limiting synthesis of results and the formation of treatment guidelines. We propose the term Post-ablation Deep vein Material Extension (PDME) to identify cases of ablative material and\/or thrombus in the adjacent deep veins, with sub-categorisations according to mode of ablation used. PDME is a distinct entity from DVT, with often a shorter clinical course, few symptoms reported by patients, and possibility of resolution without treatment in some cases. This article explores the different forms of PDME, their classifications, and possible aetiology. A precise classification is proposed to ensure transparency in future research into this area.<\/jats:p>","DOI":"10.1177\/02683555261449980","type":"journal-article","created":{"date-parts":[[2026,5,4]],"date-time":"2026-05-04T03:50:44Z","timestamp":1777866644000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":1,"title":["Post-ablation deep vein material extension (PDME) \u2013 classification, treatment considerations and future research objectives"],"prefix":"10.1177","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4216-5316","authenticated-orcid":false,"given":"Jessica","family":"Bowie","sequence":"first","affiliation":[{"name":"Imperial College London"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lowell S","family":"Kabnick","sequence":"additional","affiliation":[{"name":"Vein and Lymphatic University, Global"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5926-4578","authenticated-orcid":false,"given":"Sarah","family":"Onida","sequence":"additional","affiliation":[{"name":"Imperial College London"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5261-6913","authenticated-orcid":false,"given":"Alun H","family":"Davies","sequence":"additional","affiliation":[{"name":"Imperial College London"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2026,5,3]]},"reference":[{"key":"e_1_3_4_2_2","unstructured":"National Institute for Health and Care Excellence. 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