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Eosinophilic Infiltration in Korea: Idiopathic?

Authors
Journal
Korean Journal of Radiology
1229-6929
Publisher
The Korean Society of Radiology (KAMJE)
Publication Date
Volume
7
Issue
1
Identifiers
DOI: 10.3348/kjr.2006.7.1.4
Keywords
  • Editorial
Disciplines
  • Medicine

Abstract

04-6ÀÓÀçÈÆ 4 Korean J Radiol 7(1), March 2006 Eosinophilic Infiltration in Korea: Idiopathic? osinophilia is defined as the presence of more than 500 eosinophils/ L in the peripheral blood, and may be accompanied by eosinophil infiltration in tissues. Focal eosinophilic infiltra- tion in the lungs and liver is relatively common and is often associated with a parasitic infection, drug hypersensitivity, allergic diseases, collagen vascular diseases, and internal malignancies such as Hodgkin’s disease, as well as cancer of the lung, stomach, pancreas or ovary. An eosinophilic abscess refers to a lesion of massive eosinophil infiltration and associated destroyed tissue, and an eosinophilic granuloma refers to a lesion consisting of central necrosis and mixed inflammatory cell infiltrates with numerous eosinophils, a number of neutrophils and lymphocytes, and a palisade of epithelioid histiocytes and/or giant cells. The imaging findings of eosinophilic infiltration in the lungs and liver have mainly been reported by Korean investigators (1 9). There have only been a few case reports (10 13) from Western countries. It is unclear why this is the case and why eosinophilic disease appears to be prevalent only in Korea. Moreover, it is unclear if there are any particular parasitic, allergic, or malignant diseases prevalent in Korea only. Korean authors have addressed the possible causes of eosinophilic infiltration such as idiopathic hypere- osinophilia (1, 2, 4, 6) and malignant tumors through the tumor-associated eosinophilotactic factor (3, 5, 7 9), whereas some authors have offered no explanation (3, 9). Idiopathic hypereosinophilia is a grave disease that is characterized by persistent eosinophilia of 1,500 eosinophils/ L for more than six months, and death before six months due to congestive heart failure (14). However, the course of these patients in our clinical practice is invari- ably benign. Eosinophilic infiltration of the liver is often associated with cancer of the stomach,

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