First case report of infiltrative fibrosarcoma and basal cell carcinoma in giant anteater (Myrmecophaga tridactyla) from Villavicencio (Colombia)

We report the clinical case of a young wild male giant anteater (Myrmecophaga tridactyla), weighting 28.4 kg, that presented multiple integumentary lesions, including one in the interdigital space of the right pelvic limb, another on the pelvis, and an open, edematous wound on the upper right hip. A...

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Autores principales: Rincón, Joan Andrey, García, Andrea Valentina, Ochoa, Julieta Esperanza, Cruz, Pablo Felipe, León , Laura, Jaramillo Hernández, Dumar Alexander
Formato: Artículo revista
Lenguaje:Español
Publicado: Universidad Nacional del Nordeste 2026
Materias:
especies silvestres
neoplasia
clínica
salud animal
Acceso en línea:https://revistas.unne.edu.ar/index.php/vet/article/view/9054
Aporte de:
Revistas UNNE - Universidad Nacional del Noroeste (UNNE) de Universidad Nacional del Nordeste
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container_title_str Revistas UNNE - Universidad Nacional del Noroeste (UNNE)
language Español
format Artículo revista
topic especies silvestres
neoplasia
clínica
salud animal
spellingShingle especies silvestres
neoplasia
clínica
salud animal
Rincón, Joan Andrey
García, Andrea Valentina
Ochoa, Julieta Esperanza
Cruz, Pablo Felipe
León , Laura
Jaramillo Hernández, Dumar Alexander
First case report of infiltrative fibrosarcoma and basal cell carcinoma in giant anteater (Myrmecophaga tridactyla) from Villavicencio (Colombia)
topic_facet especies silvestres
neoplasia
clínica
salud animal
author Rincón, Joan Andrey
García, Andrea Valentina
Ochoa, Julieta Esperanza
Cruz, Pablo Felipe
León , Laura
Jaramillo Hernández, Dumar Alexander
author_facet Rincón, Joan Andrey
García, Andrea Valentina
Ochoa, Julieta Esperanza
Cruz, Pablo Felipe
León , Laura
Jaramillo Hernández, Dumar Alexander
author_sort Rincón, Joan Andrey
title First case report of infiltrative fibrosarcoma and basal cell carcinoma in giant anteater (Myrmecophaga tridactyla) from Villavicencio (Colombia)
title_short First case report of infiltrative fibrosarcoma and basal cell carcinoma in giant anteater (Myrmecophaga tridactyla) from Villavicencio (Colombia)
title_full First case report of infiltrative fibrosarcoma and basal cell carcinoma in giant anteater (Myrmecophaga tridactyla) from Villavicencio (Colombia)
title_fullStr First case report of infiltrative fibrosarcoma and basal cell carcinoma in giant anteater (Myrmecophaga tridactyla) from Villavicencio (Colombia)
title_full_unstemmed First case report of infiltrative fibrosarcoma and basal cell carcinoma in giant anteater (Myrmecophaga tridactyla) from Villavicencio (Colombia)
title_sort first case report of infiltrative fibrosarcoma and basal cell carcinoma in giant anteater (myrmecophaga tridactyla) from villavicencio (colombia)
description We report the clinical case of a young wild male giant anteater (Myrmecophaga tridactyla), weighting 28.4 kg, that presented multiple integumentary lesions, including one in the interdigital space of the right pelvic limb, another on the pelvis, and an open, edematous wound on the upper right hip. An incisional biopsy was obtained from the solid fibrinous portion of the lesion and fixed in 10% buffered formalin. Treatment with trimethoprim/sulfamethazine and ketoprofen was initiated after a few days; however, the animal failed to respond and progressively developed anorexia and marked body condition loss. Clinical examination, hematological analysis, and histopathological evaluation of the biopsy revealed an infiltrative fibrosarcoma associated with the hip lesion. Given the biopsy and blood test findings, along with clinical signs such as progressive emaciation, anorexia, and poor response to therapy, euthanasia was elected. Based on the pathological examination, the most significant findings were peritonitis and the presence of a mass compatible with mesenchymal-origin neoplasm. Histopathological evaluation confirmed an undifferentiated fibrosarcoma with giant cells, basal cell carcinoma, and hemorrhagic lymphocytic peritonitis. This report represents the first description of fibrosarcoma and basal cell carcinoma in M. tridactyla in Colombia and provides an epidemiological reference within conservation medicine for future reviews, studies, and comparisons of neoplastic cases in wild species.
publisher Universidad Nacional del Nordeste
publishDate 2026
url https://revistas.unne.edu.ar/index.php/vet/article/view/9054
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spelling I48-R154-article-90542026-01-02T16:21:22Z First case report of infiltrative fibrosarcoma and basal cell carcinoma in giant anteater (Myrmecophaga tridactyla) from Villavicencio (Colombia) Primer reporte de caso sobre fibrosarcoma infiltrativo y carcinoma de células basales en oso palmero (Myrmecophaga tridactyla) en Villavicencio, Colombia Rincón, Joan Andrey García, Andrea Valentina Ochoa, Julieta Esperanza Cruz, Pablo Felipe León , Laura Jaramillo Hernández, Dumar Alexander especies silvestres neoplasia clínica salud animal We report the clinical case of a young wild male giant anteater (Myrmecophaga tridactyla), weighting 28.4 kg, that presented multiple integumentary lesions, including one in the interdigital space of the right pelvic limb, another on the pelvis, and an open, edematous wound on the upper right hip. An incisional biopsy was obtained from the solid fibrinous portion of the lesion and fixed in 10% buffered formalin. Treatment with trimethoprim/sulfamethazine and ketoprofen was initiated after a few days; however, the animal failed to respond and progressively developed anorexia and marked body condition loss. Clinical examination, hematological analysis, and histopathological evaluation of the biopsy revealed an infiltrative fibrosarcoma associated with the hip lesion. Given the biopsy and blood test findings, along with clinical signs such as progressive emaciation, anorexia, and poor response to therapy, euthanasia was elected. Based on the pathological examination, the most significant findings were peritonitis and the presence of a mass compatible with mesenchymal-origin neoplasm. Histopathological evaluation confirmed an undifferentiated fibrosarcoma with giant cells, basal cell carcinoma, and hemorrhagic lymphocytic peritonitis. This report represents the first description of fibrosarcoma and basal cell carcinoma in M. tridactyla in Colombia and provides an epidemiological reference within conservation medicine for future reviews, studies, and comparisons of neoplastic cases in wild species. Se describe el caso clínico de un oso hormiguero, Myrmecophaga tridactyla, macho, joven, de vida silvestre, con un peso inicial de 28,4 kg que presenta diversas alteraciones tegumentarias, desde lesión en el espacio interdigital del miembro pélvico derecho, pasando por lesión en la pelvis, hasta una herida abierta y tumefacta en la parte superior derecha de la cadera. Se realizó una biopsia de tipo incisional de la porción de consistencia sólida de la lesión, cuyo aspecto es fibrinoso y se fijó en formalina buferada 10%. Pasados los días se empezó tratamiento con trimetropima/sulfametazina y ketoprofeno, sin embargo, no se vio reflejada una respuesta positiva en el animal, quien rechazó el alimento de manera progresiva hasta llegar a un rechazo total, desencadenando una pérdida de condición corporal. Tras realizar examen clínico, cuadro hemático y estudio histopatológico de la biopsia, se definió que el paciente presentaba un fibrosarcoma infiltrativo asociado a la lesión tegumentaria de la cadera. Basándose en los resultados de la biopsia, resultados del cuadro hemático signos relacionados como anorexia, emaciación progresiva, decaimiento y la baja respuesta a tratamientos médicos instaurados se decide realizar eutanasia. Con base a los hallazgos anatomopatológicos, se concluyó que las lesiones de mayor relevancia son posible peritonitis y la evidencia de masa compatible con neoplasia de origen mesenquimal. Según hallazgos histopatológicos el diagnóstico definitivo fue fibrosarcoma indiferenciado con células gigantes, carcinoma de células basales y peritonitis linfocítica hemorrágica. Se concluye que, siendo este el primer reporte de fibrosarcoma y carcinoma de células basales en M. tridactyla en Colombia, sirve como base epidemiológica dentro de la medicina de la conservación para la revisión, estudio y comparación de otros casos futuros de tipo neoplásico en especies silvestres. Universidad Nacional del Nordeste 2026-01-02 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistas.unne.edu.ar/index.php/vet/article/view/9054 10.30972/vet.3719054 Revista Veterinaria; Vol. 37 (2026); 1-8 Revista Veterinaria; Vol. 37 (2026); 1-8 1669-6840 1668-4834 spa https://revistas.unne.edu.ar/index.php/vet/article/view/9054/8757 Derechos de autor 2026 Joan Andrey Rincón, Andrea Valentina García, Julieta Esperanza Ochoa, Pablo Felipe Cruz, Laura León , Dumar Alexander Jaramillo Hernández https://creativecommons.org/licenses/by-nc/4.0

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