{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,11]],"date-time":"2026-05-11T12:10:43Z","timestamp":1778501443969,"version":"3.51.4"},"reference-count":17,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2026,5,9]],"date-time":"2026-05-09T00:00:00Z","timestamp":1778284800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"KSH Surgical Animal Medical Center"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Animals"],"abstract":"<jats:p>A 13-year-old, spayed female Maltese dog presented with acute collapse and profound lethargy of approximately 1 h duration. On admission, the dog was in hypovolemic shock, with severe hypotension, marked pallor, tachycardia, and hemoperitoneum identified by focused abdominal ultrasonography. Ultrasonography also revealed a ruptured hemorrhagic mass in the right retroperitoneal space. Because the patient was hemodynamically unstable and ongoing life-threatening hemorrhage was suspected, preoperative computed tomography was considered unsafe, and emergency exploratory laparotomy was performed following transfusion-based resuscitative stabilization. Intraoperatively, the lesion was found to involve the right kidney and caudate hepatic lobe. En bloc resection, including right nephrectomy, partial hepatectomy, and excision of the retroperitoneal-associated mass, was completed while preserving the right adrenal gland and adjacent major vasculature. Histopathologic and immunohistochemical evaluation supported a diagnosis of solid-pattern hemangiosarcoma, although a single primary site of origin could not be definitively assigned. The dog recovered without major perioperative complications, was discharged in stable condition, and maintained good quality of life for approximately 1 year; however, late clinical decline suspicious for recurrence or progression was not objectively confirmed. This case highlights the practical utility of focused ultrasonography, rapid surgical decision-making, and carefully planned en bloc resection for emergency hemorrhage control in a dog when advanced imaging was considered unsafe.<\/jats:p>","DOI":"10.3390\/ani16101451","type":"journal-article","created":{"date-parts":[[2026,5,11]],"date-time":"2026-05-11T10:50:52Z","timestamp":1778496652000},"page":"1451","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Emergency en Bloc Resection of a Ruptured Hemangiosarcoma Anatomically Associated with the Right Retroperitoneal Space, Kidney, and Caudate Hepatic Lobe in a Dog"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-9285-9264","authenticated-orcid":false,"given":"Seung-Hyun","family":"Kim","sequence":"first","affiliation":[{"name":"KSH Surgical Animal Medical Center, Gwangju 61617, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jang-Han","family":"Yoon","sequence":"additional","affiliation":[{"name":"KSH Surgical Animal Medical Center, Gwangju 61617, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3631-7224","authenticated-orcid":false,"given":"Chun-Sik","family":"Bae","sequence":"additional","affiliation":[{"name":"Department of Veterinary Surgery, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2026,5,9]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1113","DOI":"10.1016\/j.cvsm.2019.04.009","article-title":"Histiocytic sarcoma and hemangiosarcoma update","volume":"49","author":"Mullin","year":"2019","journal-title":"Vet. 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