Cutaneous myxoma in a pintagol (Sporagra magellanica X Serinus canaria)

Blume, Guilherme Reis; Pereira, Fernanda Mara Aragão Macedo; Júnior, Janildo Ludolf Reis; Sant’Ana, Fabiano José Ferreira de

doi:10.1590/0103-8478cr20141854

Cited by 2 publications

(4 citation statements)

References 7 publications

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“…No discomfort nor alteration in behavior was observed on the species due to the lesion. These clinical findings are in accordance to studies conducted by Blume et al (2015), about a small cutaneous myxoma in a pintagol (Sporagra magellanica X Serinus canaria). Due to the increase in size of the volume, surgical excision and histopathological analysis of the mass were done and a differential diagnosis was established between degenerative, inflammatory and neoplastic processes as described by Goldschimidt;Hendrick (2002).…”

Section: Resultssupporting

confidence: 92%

Histopathological diagnosis of eyelid tumor in Moustached wren (Pheugopedius genibarbis SWAINSON, 1838) (Passeriforme, Troglodytidae). A case report.

Santos

Ribeiro

Carvalho

et al. 2017

AVB

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Article historyThe aim of this work was to describe an eyelid neoplasm in wild birds, since the veterinary literature has little information concerning the aspects of the oncologic clinic in wild species. In the clinical exam, it was observed a single mass in the upper right eyelid of the Pheugopedius genibarbis a, with rough surface, cauliflower aspect, of dark-red coloration . For the histopathological diagnosis, an incisional biopsy of the lesion was done , with the fragment fixed in 10% buffered neutral formalin, processed by the method of inclusion in paraffin , cut to 4µm sections and stained with H&E . The histopathological findings revealed elongated dermal papillae covered by acanthotic epidermis, as well as thickness of the stratum spinosum . In the stratum spinosum, it was observed the presence of cells with vacuolated cytoplasm and nucleus slightly dislocated to the center of the cell, which increases in proportion when closer to the granular layer, an indication of hydropic degeneration, there were In the basal layer it is possible to notice the presence of the normal mitotic figures. Based on the macro and microscopic characteristics, that neoplasm was diagnosed as an eyelid papilloma.

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Section: Resultssupporting

confidence: 92%

Histopathological diagnosis of eyelid tumor in Moustached wren (Pheugopedius genibarbis SWAINSON, 1838) (Passeriforme, Troglodytidae). A case report.

Santos

Ribeiro

Carvalho

et al. 2017

AVB

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“…Os achados anatomopatológicos observados no presente caso são similares aos descritos em outros estudos [2,7,11]. Uma vez que mixoma é considerado um neoplasma infiltrativo, recidiva após extirpação cirúrgica pode ocorrer [7], entretanto isto não foi observado no presente caso e em outras descrições dessa neoplasia em outras espécies [2,11]. O principal diagnóstico diferencial do mixoma é o fibroma e a detecção de mucina positiva na coloração Alcian Blue pH 2,5 na matriz extracelular confirma o diagnóstico histopatológico de mixoma, conforme notado no presente estudo.…”

Section: Discussionunclassified

“…Mixoma é um neoplasma benigno de células mesenquimais que produz matriz intersticial abundante e rica em mucopolissacarídeos (mucina). Esse tumor tem sido descrito ocasionalmente em cães e gatos velhos, e raramente em outras espécies [2,7,11]. No trato digestório de bovinos, mixomas podem afetar os pré-estômagos devido à natureza do tecido conjuntivo das papilas do rúmen e omaso [1], porém não há descrições desse neoplasma na cavidade oral.…”

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Oral Myxoma in a Steer

Pinto

Blume

Medeiros

et al. 2018

Acta Scientiae. Vet.

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Background: Myxoma is a benign neoplasm of mesenchymal cells producing a myxomatous matrix rich in mucopolysaccharides. This tumor occasionally has been described in older dogs and cats, and rarely occurs in other species. In ruminants myxomas can be found in the rumen and omasum, but there are no reports of these neoplasms involving the oral cavity of cattle. Only one case of myxoma was diagnosed in a 40-year study of 606 neoplasms in cattle in South Africa. Similar retrospective studies done in cattle from southern and northeastern Brazil also detected a single case of cutaneous myxoma. The current study reports the clinical and pathological findings of a rare occurrence of bovine oral myxoma.Case: A 22-month-old male crossbreed steer (Bosindicus) from the municipality of Rio Verde, GO (17°44′42″S 50°55′00″W), Brazil, presented a history of sialorrhea. There is no another affected animal in the herd. Clinical evaluation revealed mild swelling in the lower incisive gum. Treatment with flumetasone IM for three consecutive days was performed. Two months after this procedure, there was a considerable increase in the size to a flat, firm mass of 16x13x9 cm. Other clinical signs included emaciation and severe difficulty in feeding and drinking water. After surgical excision, fragments of the tumor were collected for histopathology. There is no local recurrence within approximately one year of the surgery. Microscopically, the lamina propria was found to be expanded and replaced by a nonencapsulated, moderately cellular, poorly demarcated, neoplastic proliferation. The lesion was composed of numerous loosely arranged bundles of cells in an abundant myxoid matrix. The bulk of the tumor parenchyma was formed by spindle or stellate cells with poorly demarcated borders and scant, eosinophilic cytoplasm. The nuclei were oval and hyperchromatic. Mild anisocytosis and anisokaryosis were present, along with rare mitotic figures. The myxoid matrix presented strong positive labeling to mucin by the Alcian blue staining. Based on the anatomopathological and histochemical findings, a diagnosis of myxoma was established.Discussion: Neoplasms of connective tissue originate from poorly differentiated fibroblasts and can produce collagenous (fibroma/fibrosarcoma) or mucinous (myxoma/myxosarcoma) stroma. In some cases, it is difficult to establish a histopathological classification and to distinguish between benign and malignant neoplasms, for which assessment of cell morphology, mitotic index, and biologic behavior are required. Very few cases of myxoma have been previously reported in cattle, this neoplasm and it was never diagnosed in the oral cavity of this species. Thre majority of neoplasms diagnosed in the oral cavity of cattle are squamous cell carcinomas and papillomas, although sporadic cases of lingual fibroma, lingual mastocytoma, odontoma and ameloblastic fibroma have been described. In the current case, the steer presented weight loss and difficulty in feeding and drinking water, probably due to the large volume of the neoplasm. Similar clinical signs can occur in cattle affected by other types of large neoplasms in the oral cavity. After surgical excision, the animal of the current report presented general improvement and considerable weight gain. The myxoma-related pathologic findings observed in the present case are similar to those described in other studies. Because myxoma is considered an infiltrative neoplasm, postoperative recurrence can occur; however, this was not noted in the current case and reports of myxoma in other species. The main differential diagnosis for myxoma is fibroma; the presence of mucin (Alcian blue positive) in the intercellular matrix as seen in the current case confirms the diagnosis of myxoma.

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Cutaneous myxoma in a pintagol (Sporagra magellanica X Serinus canaria)

Abstract: Myxomas are benign mesenchymal tumors rarely described in birds. This report describes the clinical and

Cited by 2 publications

References 7 publications

Histopathological diagnosis of eyelid tumor in Moustached wren (Pheugopedius genibarbis SWAINSON, 1838) (Passeriforme, Troglodytidae). A case report.

Histopathological diagnosis of eyelid tumor in Moustached wren (Pheugopedius genibarbis SWAINSON, 1838) (Passeriforme, Troglodytidae). A case report.

Oral Myxoma in a Steer

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