title: Perivascular parenchymal extension of the ablation zone following liver microwave ablation.
abstract: A 69-year-old man who presented with abdominal discomfort was, on examination, found to have a palpable abdominal mass. Contrast-enhanced CT showed a mass arising from the inferior vena cava, which biopsy confirmed to be a leiomyosarcoma. One month after chemoradiotherapy, CT demonstrated a new 15 mm solitary central right liver metastasis. Microwave ablation (MWA) of the metastasis was performed using an Acculis Sulis V system (Angiodynamics, USA) at a power of 140 Watts for 4 min, with no immediate complications. After 1 month, MRI with gadolinium was performed to assess the liver ablation zone. The MRI demonstrated thrombosis of a right inferior hepatic vein branch leading to the ablation zone and extension of the ablation zone 1 cm into the tissue around the thrombosed vessel.
authors.affiliation: Interventional Oncology Service, University College Hospital, University College London, London, UK.
authors.forename: Saurabh
authors.identifier: http://orcid.org/0000-0002-8730-524X
authors.initials: S
authors.lastname: Singh
authors.affiliation: Hepatopancreatobiliary and Liver Transplant Surgery Unit, Royal Free Hospital, University College London, London, UK.
authors.forename: Pulathis Nilantha
authors.initials: PN
authors.lastname: Siriwardana
authors.affiliation: Interventional Oncology Service, University College Hospital, University College London, London, UK.
authors.forename: Edward William
authors.initials: EW
authors.lastname: Johnston
authors.affiliation: Interventional Oncology Service, University College Hospital, University College London, London, UK.
authors.forename: Steven
authors.initials: S
authors.lastname: Bandula
authors.affiliation: Hepatopancreatobiliary and Liver Transplant Surgery Unit, Royal Free Hospital, University College London, London, UK.
authors.forename: Brian Ritchie
authors.initials: BR
authors.lastname: Davidson
authors.affiliation: Interventional Oncology Service, University College Hospital, University College London, London, UK.
authors.forename: Rowland Oliver
authors.initials: RO
authors.lastname: Illing
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D006503:Hepatic Veins; D006801:Humans; D007890:Leiomyosarcoma / Q000000981:diagnostic imaging / Q000556:secondary* / Q000628:therapy*; D008113:Liver Neoplasms / Q000000981:diagnostic imaging / Q000556:secondary* / Q000628:therapy*; D008279:Magnetic Resonance Imaging; D008297:Male; D008872:Microwaves / Q000009:adverse effects / Q000627:therapeutic use*; D013927:Thrombosis / Q000000981:diagnostic imaging / Q000209:etiology / Q000628:therapy; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome; D019043:Vascular Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology*; D014682:Vena Cava, Inferior / Q000000981:diagnostic imaging / Q000473:pathology*