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RELATO DE CASOS hyperparathyroidism Oral lesions associated with renal secondary / CASE REPORTSin an English bulldog

Oral lesions associated with renal secondary hyperparathyroidism in an English bulldog Lesões orais associadas ao hiperparatireoidismo renal secundário em um Buldogue Inglês
Selwyn Arlington Headley1*; Vanessa Cristina Veltrini 2; Egon José Fuck3; Eliane Thomaselli Fuck3;Carlos Everton Curti3; Carlos Mais Bettini4; Ana Paula Frederico Rodrigues Loureiro Bracarense 5; Antônio Carlos Faria dos Reis5

Abstract
Renal secondary hyperparathyroidism is a complex clinical syndrome frequently described in dogs. However, in most cases, lesions are characterized by fibrous osteodystrophy of facial bones, affecting principally the mandible and the maxilla. There are few reportsof renal secondary hyperparathyroidism associated with facial tumorous masses in the dog; similar findings in dogs have not been previously described in Brazil. This report describes the clinical, pathological, and radiological findings of this syndrome in a 14-month-old dog with oral tumorous-like lesions. The pathogenesis associated with this disease is also discussed. Kew words:Hyperparathyroidism, kidney, bone, dog

Resumo
Hiperparatireoidismo renal secundário é uma síndrome clínica complexa freqüentemente descrita em cães. Entretanto, na maioria dos casos as lesões são caracterizadas por osteodistrofia fibrosa dos ossos faciais, afetando principalmente a mandíbula e a maxila. Existem poucos relatos do hiperparatireoidismo renal secundário associada a massas tumorais na face decães; achados semelhantes em cães não foram anteriormente descritos no Brasil. Este relato descreve os achados clínicos, patológicos e radiológicos dessa síndrome em um cão de 14 meses de idade com lesões semelhantes a tumores na cavidade bucal. A patogenia associada a essa doença também é discutida. Palavras-chave: Hiperparatireoidismo, rim, osso, cão

Department of Basic Veterinary Sciences,Faculty of Veterinary Medicine, University of Helsinki, Helsinki, P.O.Box 66 (Agnes Sjöbergin katu 2), FI-00014, Finland; E-mail: selwyn.headley@helsinki.fi 2 Laboratório de Patologia Bucal, Centro Universitário de Maringá (CESUMAR), Maringá, PR, Brasil. 3 Hospital Veterinário SOS Animal, Maringá, PR, Brasil. 4 Setor de Radiologia, Hospital Veterinário, CESUMAR, Maringá, PR, Brasil. 5 Departamento deMedicina Veterinária Preventiva, Universidade Estadual de Londrina, Londrina, PR, Brasil. * Autor para correspondência
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Recebido para publicação 12/05/07 Aprovado em 24/01/08

Semina: Ciências Agrárias, Londrina, v. 29, n. 2, p. 407-412, abr./jun. 2008

407

Headley, S. A. et al.

Renal secondary hyperparathyroidism (RSHPTH) is a well-recognized clinical entity observed in young dogsdue to an increase in the levels of the parathyroid hormone (PTH) with nonendocrine alterations in the metabolism of calcium and phosphorus (FORREST, 2002; PALMER, 1993; TORRANCE, 1998; WEISBRODE, 2007). This syndrome is also referred as renal osteodystrophy, rubber jaw, renal rickets, and renal osteitis fibrosa (PALMER, 1993). In most cases, associated lesions are frequently described in themandible and maxilla bones (TORRANCE, 1998; FORREST, 2002), but in severe cases gross detectable lesions are present in the nasal and frontal bones of the face and in the zigomatic arch (THOMPSON, 2007). Occasionally, facial swelling and marked demineralization of bones of the head may occur (PALMER, 1993). However, there are few descriptions of oral swelling associated with this syndrome in the dog;two cases have been previously described: one in a Great Dane (NORRDIN, 1975), and the other in a Labrador retriever (SARKIALA; DAMBACH; HARVEY, 1994), and there is also the classical text-book reference (THOMPSON, 2007; WEISBRODE, 2007). This report is important since it describes a case of oral lesions associated with renal secondary hyperparathyroidism in a 14-monthold dog. It provides...
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