日本新生児成育医学会雑誌 27(2):275-279;2015  |
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日本新生児成育医学会雑誌 第27巻第2号 71~75頁(2015年) |
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受付日:平成26.11.18 |
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受理日:平成27.03.05 |
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Fragmentation hemolysis を呈した先天性サイトメガロウイルス感染の早産児例 |
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An Extremely Low Birth Weight Infant with Congenital Cytomegalovirus Infection and Fragmentation Hemolysis |
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富山県立中央病院 小児科 |
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Department of Pediatrics, Toyama Prefectural Central Hospital |
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東山弘幸・嶋尾綾子・伊奈志帆美・二谷 武・畑崎喜芳 |
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Hiroyuki HIGASHIYAMA,Ayako SHIMAO,Shihomi INA,Takeshi FUTATANI,Kiyoshi HATASAKI |
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Key Words:premature infants,hemolytic anemia,cytomegalovirus,methemoglobin
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溶血性貧血の発症を契機に先天性サイトメガロウイルス(以下CMV)感染を診断した早産児の1 例を経験した。症例は在胎26 週,806g で出生の男児。出生後経過は比較的順調であったが,日齢31 に破砕赤血球の増加を伴うfragmentation hemolysis,肝脾腫,血小板減少が出現した。赤血球輸血のみで症状は自然に軽快した。後に,日齡5 に採取した濾紙血でCMV-DNA を検出し,先天性感染を確認した。先天性CMV 感染に溶血性貧血を合併したとの報告は散見されるが,その機序は今のところ不明である. 本症においてもCMV の関与を示す直接的な証拠はないが,近年CMV 感染と血管内皮障害との関連性を示唆する報告が増えており,CMV 感染がfragmentation hemolysis の要因になり得ると考えられた。また発症前に軽度のメトヘモグロビン血症がみられ,急性期離脱後の早産児にみられる溶血発作の過去の報告例との異同につき考察した。 |
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We experienced a case of extremely low birth weight infant associated with congenital cytomegalovirus infection and
fragmentation hemolysis.
A male infant, born at 26 weeks of gestation, went his first 4 weeks of life without remarkable events. On the 31st day
of life, he was noticed to be pale and the subsequent examinations revealed mild thrombocytopenia and severe hemolytic
anemia with fragmented red blood cells on his peripheral blood smear. He recovered with transfusion of packed red
blood cells and no further treatment was needed. Congenital CMV infection was confirmed by detecting cytomegalovirus
DNA in his blood spot sample on the filter paper on his fifth day of life. Possible link between cytomegalovirus infection
and hemolytic anemia was discussed and reviewed in this premature infant and the previously reported patients. |
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