title: Significance of perivascular soft tissue around the common hepatic and proximal superior mesenteric arteries arising after pancreaticoduodenectomy: evaluation with serial MDCT studies.
abstract: OBJECTIVE
  To evaluate the interval change of perivascular soft tissue (PVST) around the common hepatic and proximal superior mesenteric arteries arising after pancreaticoduodenectomy (PD) and to compare the difference between post operative change (benign PVST) and recurrence (malignant PVST).
  
  
  METHODS
  Serial multidetector CT (MDCT) studies in 44 patients who underwent PD for periampullary carcinomas were retrospectively reviewed (Group A). The incidence and interval change of PVST were evaluated and compared to control group (Group B, 21 patients with PD for benign diseases).
  
  
  RESULTS
  PVST was seen in all the 44 patients in Group A, and it was noted in 12 of 21 (57.1%) patients in Group B. Thirteen of 44 (29.5%) patients showed interval enlargement of PVST (malignant PVST), and 12 of 13 developed within 2 years after PD. There was higher incidence of malignant PVST in patients with lymph node metastasis (p < 0.01) and those with pancreas head carcinoma (p < 0.05).
  
  
  CONCLUSIONS
  PVST is common after PD regardless of whether patients had malignant or benign diseases. PVST should be monitored for at least 2 years to distinguish recurrence from post operative change. Patients with lymph node metastasis and pancreas head carcinoma had a higher incidence of malignant PVST.
authors.affiliation: Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan. Ishigamikousei@aol.com
authors.forename: Kousei
authors.initials: K
authors.lastname: Ishigami
authors.forename: Kengo
authors.initials: K
authors.lastname: Yoshimitsu
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Irie
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Tajima
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Asayama
authors.forename: Masakazu
authors.initials: M
authors.lastname: Hirakawa
authors.forename: Daisuke
authors.initials: D
authors.lastname: Kakihara
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Shioyama
authors.forename: Yunosuke
authors.initials: Y
authors.lastname: Nishihara
authors.forename: Koji
authors.initials: K
authors.lastname: Yamaguchi
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Honda
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001650:Bile Duct Neoplasms / Q000473:pathology / Q000601:surgery*; D003287:Contrast Media; D005260:Female; D005500:Follow-Up Studies; D006499:Hepatic Artery / Q000000981:diagnostic imaging*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007472:Iohexol; D008207:Lymphatic Metastasis; D008297:Male; D017538:Mesenteric Artery, Superior / Q000000981:diagnostic imaging*; D008875:Middle Aged; D010190:Pancreatic Neoplasms / Q000473:pathology / Q000601:surgery*; D016577:Pancreaticoduodenectomy; D011856:Radiographic Image Enhancement / Q000379:methods; D012189:Retrospective Studies; D012983:Soft Tissue Neoplasms / Q000000981:diagnostic imaging* / Q000209:etiology / Q000556:secondary; D014057:Tomography, X-Ray Computed / Q000379:methods*
chemical_list: D003287:Contrast Media; D007472:Iohexol