title: Clinical features of clinically diagnosed eosinophilic liver abscesses.
abstract: OBJECTIVE
  Eosinophilic liver abscesses (ELAs) are frequently encountered in the clinical field based on typical computed tomography (CT) findings and the presence of peripheral eosinophilia. In this study, the authors evaluated the clinical features and natural course of CT diagnosed ELAs.
  
  
  METHODS
  The medical records of patients that underwent abdominal CT from July 2004 to February 2008 at Seoul National University Hospital were retrospectively evaluated. ELA was clinically diagnosed by the presence of peripheral eosinophilia (≥500 μL(-1)) and typical CT findings. The presumptive causes of clinically diagnosed ELA were divided into three categories, namely, parasitic infections, malignancies, and unidentified etiologies. Clinical courses and responses to treatment were evaluated.
  
  
  RESULTS
  Clinically diagnosed ELAs were identified in 164 patients and the incidence of ELA was 0.68%. Of these patients, 118 (71.9%) showed radiologic resolution of clinically diagnosed ELA at a median 6.2 (0.2-33.1) months. In addition, 79 (48.2%) patients also achieved normalization of peripheral eosinophilia with radiologic resolution of clinically diagnosed ELA. In patients without identified etiologies, mean time to radiologic resolution was significantly shorter for patients treated empirically with an anti-parasitic drug than for those not treated [4.4 (0.9-26.3) vs. 12.2 (1.5-33.2) months, median (range), P = 0.001].
  
  
  CONCLUSIONS
  Clinically diagnosed ELA adopts a relatively benign course. Empirical anti-parasitic treatment in patients without an identified etiology may shorten the duration of clinically diagnosed ELA.
authors.affiliation: Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea.|Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul, South Korea.
authors.forename: Jae-Woo
authors.initials: JW
authors.lastname: Kwon
authors.affiliation: Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea.|Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul, South Korea.
authors.forename: Tae-Wan
authors.initials: TW
authors.lastname: Kim
authors.affiliation: Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea.|Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul, South Korea.
authors.forename: Kyung-Mook
authors.initials: KM
authors.lastname: Kim
authors.affiliation: Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea.|Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul, South Korea.
authors.forename: So-Hee
authors.initials: SH
authors.lastname: Lee
authors.affiliation: Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea.|Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul, South Korea.
authors.forename: Sang-Heon
authors.initials: SH
authors.lastname: Cho
authors.affiliation: Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea.|Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul, South Korea.
authors.forename: Kyung-Up
authors.initials: KU
authors.lastname: Min
authors.affiliation: Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea.|Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul, South Korea.
authors.forename: You-Young
authors.initials: YY
authors.lastname: Kim
authors.affiliation: Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea. guinea71@snu.ac.kr.|Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul, South Korea. guinea71@snu.ac.kr.
authors.forename: Heung-Woo
authors.initials: HW
authors.lastname: Park