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要 約
症例は日本短角種牛3例（2〜18カ月齢，雄2頭，雌1頭）で，全例とも難産で出生し，出生時から著しい全身性の冷性浮腫を呈していた．症例3においてリンパ管の観察を目的として飛節の外側皮下組織に墨汁を注入したが，剖検時にはリンパ管は観察されず，墨汁は注入部位
で停滞していた．また，病理組織学的検索では全例の一部のリンパ節に辺縁洞の拡張や髄索の水腫が観察された．これらの所見から本症例を先天性リンパ水腫と診断した．また，全例に共通 して低蛋白血症や低アルブミン血症，血漿浸透圧の低下が観察されたが，これらの変化は著しい浮腫に伴う二次的な変化であると考えられた．本症例は日本短角種牛における最初の先天性リンパ水腫の報告例である．
―キーワード：先天性リンパ水腫，全身性冷性浮腫，日本短角種牛．
--------------------日獣会誌 95〜98（2001）
Three Cases of Congenital Lymphedema
in Japanese Shorthorn Cattle
Jun SATO＊†, Reeko SATO, Naoichiro HATAKEYAMA,
Yoh-ichi MIYAKE, Masanobu GORYO and Yoshihisa NAITO
＊Faculty of Agriculture, Iwate University, 3-18-1 Ueda,
Morioka 020-8550, Japan
SUMMARY
Three Japanese shorthorn cattle (two males and one female: 2〜18 months old) born with
difficulty demonstrated severe generalized cold edema. In case No. 3, to clarify disturbance of peripheral
lymph flow, 3 ml of India ink was injected subcutaneously into the hock. At necropsy, in the subcutaneous
tissue, no ink absorption was observed in peripheral lymphatics, the injected ink was retained within
the injection site. Histopathological observation revealed dilation of the subcapsular sinus and edema
of the medullar cords in several lymph nodes. On the basis of these findings, the three cases were diagnosed
as congenital lymphedema. Hypoproteinemia, hypoalbuminemia, and decreased plasma osmotic pressure were
common to all three. It seemed that these changes were secondary to severe edema. This appears to be
the first case of congenital lymphedema in Japanese shorthorn cattle.
―Key words : congenital lymphedema, generalized cold edema, Japanese shorthorn cattle.
† Correspondence to : Jun SATO (Faculty of Agriculture, Iwate University) 3-18-1 Ueda, Morioka 020-8550，Japan
TEL・FAX 019-621-6227
--------------------J. Jpn. Vet. Med. Assoc.、54, 95〜98 (2001) |
