犬の尿路上皮癌に対する新たな治療プロトコルにより長期生存を実現

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2025-06-01 東京大学

東京大学大学院農学生命科学研究科の研究チームは、犬の膀胱三角部に広がる尿路上皮癌に対し、膀胱尿道全摘出術と分子標的薬を組み合わせた新たな治療プロトコルを開発しました。21例の臨床試験で、従来の治療法を上回る中央値481日(約16ヶ月)の生存期間を達成し、14%の症例では2年以上の生存が確認されました。術後の短期合併症として下痢や急性腎障害、長期合併症として慢性腎障害や腎盂腎炎が報告され、術前のCT検査と手術の間隔を空けることで急性腎障害のリスク低減が示唆されました。この成果は、犬の尿路上皮癌に対する治療戦略の改善に貢献するものです。

犬の尿路上皮癌に対する新たな治療プロトコルにより長期生存を実現

犬の尿路上皮癌の診断時の超音波検査画像

<関連情報>

犬の膀胱三角部尿路上皮癌における内科的治療を併用した膀胱全摘除術の成績 Outcomes of total cystectomy with medical treatment in canine urothelial carcinoma of the bladder trigone

Yosuke Takahashi, Daiki Kato, Shingo Maeda, Tomoki Motegi, Atsushi Fujita, Yuko Hashimoto, Takayuki Nakagawa, Ryohei Nishimura
The Canadian Veterinary Journal
PMID:https://pubmed.ncbi.nlm.nih.gov/40070938/

Abstract

Objective: This study aimed to evaluate outcomes and complications in dogs with urothelial carcinoma (UC) of the bladder trigone treated with total cystectomy using uretero-prepuce/vagina/cutaneous anastomosis combined with medical treatment.

Animals: Twenty-one dogs.

Procedure: Total cystectomy was completed as follows: The whole bladder and urethra were removed, and the ureters were anastomosed to the skin in 1 case and to the vagina in 9 cases in females. The entire bladder, prostate, urethra, and penis were removed, and the ureters were anastomosed to the prepuce in 11 males. Medical treatments were administered to all dogs after surgery.

Results: Short-term surgical complications included diarrhea (16 dogs), acute kidney injury (2 dogs), and dehiscence of the ureterovaginal anastomosis (3 dogs). Long-term surgical and medical complications included pyelonephritis (11 dogs) and chronic kidney disease (5 dogs). In the survival analysis, median survival time from the initial diagnosis in all cases was 481 d, which was longer than the previously reported median survival time in dogs with UC involving the trigone.

Conclusion and clinical relevance: Total cystectomy combined with medical treatment prolonged overall survival compared with medical, surgical, or stenting procedures in dogs with UC involving the trigone.

Copyright and/or publishing rights held by the Canadian Veterinary Medical Association.

医療・健康
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