Get access to all handy features included in the IVIS website
- Get unlimited access to books, proceedings and journals.
- Get access to a global catalogue of meetings, on-site and online courses, webinars and educational videos.
- Bookmark your favorite articles in My Library for future reading.
- Save future meetings and courses in My Calendar and My e-Learning.
- Ask authors questions and read what others have to say.
Abdominal metastatic melanoma in a horse
Queiroz Junqueira, Daniela; Souza...
Get access to all handy features included in the IVIS website
- Get unlimited access to books, proceedings and journals.
- Get access to a global catalogue of meetings, on-site and online courses, webinars and educational videos.
- Bookmark your favorite articles in My Library for future reading.
- Save future meetings and courses in My Calendar and My e-Learning.
- Ask authors questions and read what others have to say.
Read
Introduction: Melanoma is a malignant neoplasm that especially affects gray-haired animals. The predilection sites are tail and perineum, but may also occur in genitals and ocular, auricular and parotid regions.
Clinical History: A 20-year-old mixed breed horse, brown-haired, was referred for treatment with funiculitis resulting from an orchiectomy performed 20 days ago. It was reported that had lost weight since the orchiectomy and had an acute abdomen that resolved with clinical treatment.
Relevant clinical findings: The prepuce and inguino-scrotal regions were edematous and the surgical wound showed purulent exudate. Transrectal palpation revealed a firm mass on the pelvic cavity extending into the abdominal cavity. Hemogram showed anemia and leukopenia with left shift.
Treatment And Management: Local treatment was instituted with hydrogen peroxide and 2% iodine solution, and systemic treatment with dipyrone and penicillins.
Evolution: After seven days treatment anemia and leukopenia were resolved. The horse was alert, with appetite, and volume increase in the inguinal region had disappeared, but the weight loss persisted. Two weeks after admission the horse manifested abdominal pain and died.
Post-Mortem Findings: A mass was found in the abdominal cavity extending to the pelvic cavity (46x36x24 cm/ 25.85 kg). It was attached to the mesentery of the small colon. There were also brownish nodules in abdominal cavity and omentum lymph nodes, as well as in the peritoneum. Histopathological examination revealed atypical mitosis, cells with vacuolated cytoplasm and large number of tumor cells with brownish pigment inside, positive for Fontana Masson staining special for melanin.
Discussion: it was not possible to establish the site, since the cutaneous tumor was probably surgically removed and not identified. Melanoma is a neoplasm that occurs not only in grey-haired horses and that can cause metastases. Abdominal neoplasms must be considered as differential diagnosis in progressive weight loss in elderly horses.
References
- Melotti VD, Souza RG, Moscaridini ARC, Saquetti CHC, Ferreira RF. Estudo retrospectivo de dermatopatias nodulares em equinos atendidos no centro de medicina veterinária da PMDF no período de 2011 a 2018. Revista Ciência e Saúde Animal. 2020;2(2):19-33.
- Monteverde AC, Passos LFP, Roldão CH, Silva MA. Melanoma maligno metastático disseminado pela cavidade abdominal em equino tordilho. Revista Acadêmica de Ciência Animal. 2017;15(1):307- 308.
- Ucheaga EM, Emmanuel ER, Wayuta MP. A. case of colic due to metastatic melanoma in a 23-yearold mare. Animal Research Internacional. 2022;19(3):4643-4647.
Get access to all handy features included in the IVIS website
- Get unlimited access to books, proceedings and journals.
- Get access to a global catalogue of meetings, on-site and online courses, webinars and educational videos.
- Bookmark your favorite articles in My Library for future reading.
- Save future meetings and courses in My Calendar and My e-Learning.
- Ask authors questions and read what others have to say.
About
Affiliation of the authors at the time of publication
1Centro Universitário Barão De Mauá, Veterinary Hospital, Ribeirão Preto, Brasil
Comments (0)
Ask the author
0 comments