{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,8,29]],"date-time":"2025-08-29T00:03:49Z","timestamp":1756425829814,"version":"3.44.0"},"reference-count":17,"publisher":"BMJ","issue":"12","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2020,11,23]]},"published-print":{"date-parts":[[2020,12]]},"abstract":"<jats:p>We report the case of a 35-year-old woman who presented with recurrent macroscopic haematuria and known diagnosis of Klippel-Trenaunay syndrome. Imaging and cystoscopy identified an extensive venous malformation involving a large area of the bladder wall. Holmium laser therapy was ineffective at obtaining symptom control. Following a multidisciplinary team meeting, transvenous sclerotherapy with sodium tetradecyl sulphate was performed under image guidance. A reduction in venous density was observed on cystoscopy and the patient has had complete resolution of symptoms within 6 weeks and continued to be asymptomatic up to 24-month follow-up. We propose that transvenous sclerotherapy is considered first-line treatment in this clinical setting.<\/jats:p>","DOI":"10.1136\/bcr-2019-229823","type":"journal-article","created":{"date-parts":[[2020,12,22]],"date-time":"2020-12-22T18:18:21Z","timestamp":1608661101000},"page":"e229823","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":2,"title":["Sclerotherapy treatment of a large venous malformation invading the bladder wall related to Klippel-Trenaunay syndrome"],"prefix":"10.1136","volume":"13","author":[{"given":"Luke","family":"Foster","sequence":"first","affiliation":[{"name":"Department of Urology, Royal Free London NHS Foundation Trust, London, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0213-1402","authenticated-orcid":false,"given":"Narayan","family":"Karunanithy","sequence":"additional","affiliation":[{"name":"Department of Interventional Radiology, Guy's and St 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