{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,29]],"date-time":"2026-06-29T04:45:11Z","timestamp":1782708311086,"version":"3.54.5"},"reference-count":20,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2026,6,23]],"date-time":"2026-06-23T00:00:00Z","timestamp":1782172800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Veterinary Sciences"],"abstract":"<jats:p>Apocrine sweat gland adenocarcinoma is an uncommon feline adnexal neoplasm, and lower-lip involvement is rarely documented. A 14-year-old spayed female Siamese cat was evaluated for a firm 1.3 cm right lower-lip mass at a documented hemorrhagic lesion site. Approximately 1 year earlier, the lesion was fluctuant and superficially erosive to ulcerative; fine-needle aspiration yielded bloody fluid with cytologically nondiagnostic material. The lesion reportedly subsided after empirical treatment, but reassessment, tissue diagnosis, and objective confirmation of resolution were not performed. Cytology of the later same-site mass supported malignant epithelial neoplasia. Contrast-enhanced computed tomography (CT) identified a 12.5 \u00d7 13.2 \u00d7 16.6 mm rim-enhancing mass without mandibular invasion or distant metastasis; the ipsilateral mandibular lymph node was mildly thickened. Histopathology supported a diagnosis of lower-lip apocrine sweat gland adenocarcinoma with lymphovascular tumor emboli, lymphatic invasion, and nodal metastasis. The diagnosis was supported by superficial dermal\/subcutaneous location, adjacent adnexal structures, skeletal-muscle separation from nearby minor salivary glands, epithelial immunoreactivity, periodic acid-chiff (PAS) and Alcian blue findings without distinct intratumoral mucin\/mucopolysaccharide-rich material. The cat died without necropsy on postoperative day 87. This case supports tissue-based diagnosis and regional lymph node assessment for suspicious feline lower-lip glandular epithelial lesions.<\/jats:p>","DOI":"10.3390\/vetsci13070606","type":"journal-article","created":{"date-parts":[[2026,6,24]],"date-time":"2026-06-24T05:37:17Z","timestamp":1782279437000},"page":"606","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Feline Lower-Lip Apocrine Sweat Gland Adenocarcinoma with Mandibular Nodal Metastasis: A Case Report"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0009-0007-8194-1206","authenticated-orcid":false,"given":"Yongwon","family":"Park","sequence":"first","affiliation":[{"name":"24Soom Animal Hospital, 715 Gwonseon-ro, Gwonseon-gu, Suwon 16568, Republic of Korea"},{"name":"Department of Veterinary Surgery, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ajin","family":"Lee","sequence":"additional","affiliation":[{"name":"24Soom Animal Hospital, 715 Gwonseon-ro, Gwonseon-gu, Suwon 16568, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jeonghoon","family":"Jang","sequence":"additional","affiliation":[{"name":"24Soom Animal Hospital, 715 Gwonseon-ro, Gwonseon-gu, Suwon 16568, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6237-9958","authenticated-orcid":false,"given":"Hwi-Yool","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Veterinary Surgery, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,6,23]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Meuten, D.J. 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Oncol."}],"container-title":["Veterinary Sciences"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2306-7381\/13\/7\/606\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,6,29]],"date-time":"2026-06-29T04:10:44Z","timestamp":1782706244000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2306-7381\/13\/7\/606"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,6,23]]},"references-count":20,"journal-issue":{"issue":"7","published-online":{"date-parts":[[2026,7]]}},"alternative-id":["vetsci13070606"],"URL":"https:\/\/doi.org\/10.3390\/vetsci13070606","relation":{},"ISSN":["2306-7381"],"issn-type":[{"value":"2306-7381","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,6,23]]}}}