title: Prevalence of Isolated Asymptomatic Deep Vein Thrombosis in Varicose Vein Patients with Superficial Thrombophlebitis: A Single Center Experience in Japan.
abstract: OBJECTIVE
  Prevalence of asymptomatic deep vein thrombosis (DVT) in patients with primary varicose veins remains unclear.
  
  
  METHODS
  Here, we conducted a retrospective study to clarify the incidence of asymptomatic DVT in patients with varicose veins, especially focusing on those with superficial thrombophlebitis (STP).
  
  
  RESULTS
  Among 431 patients with primary varicose veins with saphenous vein incompetence, 20 (4.64%) had asymptomatic DVT. The presence of STP was a significant risk factor for asymptomatic DVT as 10 of the 24 (41.7%) patients with STP had asymptomatic DVT, and all cases having calf muscle vein thrombosis. In contrast, of the patients with primary varicose veins without STP only 2.46% had asymptomatic DVT.
  
  
  CONCLUSIONS
  In patients with primary varicose veins with STP, significant risk factors for DVT were being over C3 on the clinical, etiological, anatomical, and pathophysiological (CEAP) classification. (This article is a translation of Jpn J Phlebol 2014; 25: 13-19.).
authors.affiliation: Department of Vascular Surgery and Varicose Vein Center, Aisei Hospital, Tokyo, Japan.
authors.forename: Nozomu
authors.initials: N
authors.lastname: Shirasugi
authors.affiliation: Department of Vascular Surgery and Varicose Vein Center, Aisei Hospital, Tokyo, Japan.
authors.forename: Sadaaki
authors.initials: S
authors.lastname: Horiguchi
authors.affiliation: Department of Vascular Surgery and Varicose Vein Center, Aisei Hospital, Tokyo, Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Shirato
authors.affiliation: Department of Vascular Surgery and Varicose Vein Center, Aisei Hospital, Tokyo, Japan.
authors.forename: Toshimitsu
authors.initials: T
authors.lastname: Kawakami
authors.affiliation: Department of Vascular Laboratory, Aisei Hospital, Tokyo, Japan.
authors.forename: Hisako
authors.initials: H
authors.lastname: Ono
authors.affiliation: Department of Vascular Surgery and Varicose Vein Center, Aisei Hospital, Tokyo, Japan.
authors.forename: Shiho
authors.initials: S
authors.lastname: Yabuki
authors.affiliation: Department of Vascular Surgery, Teikyo University, Tokyo, Japan.
authors.forename: Kumiko
authors.initials: K
authors.lastname: Jojima
authors.affiliation: Department of Vascular Surgery, Teikyo University, Tokyo, Japan.
authors.forename: Masanori
authors.initials: M
authors.lastname: Niimi
keywords: deep vein thrombosis; superficial thrombophlebitis; varicose veins