Anomalias congênitas do trato urinário superior: novas imagens das mesmas doenças

Maranhão, Carol Pontes de Miranda; Miranda, Christiana Maia Nobre Rocha de; Santos, Carla J.; Farias, Lucas de Pádua Gomes de; Padilha, Igor Gomes

doi:10.1590/s0100-39842013000100013

Cited by 11 publications

(11 citation statements)

References 20 publications

(29 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Por outro lado, esses achados foram distintos dos casos de hipoplasia renal, que embora cursassem com redução do volume renal, não estariam associados a alterações estruturais do parênquima renal [12] ou distúrbios da dinâmica de filtração de meios de contraste. Também diferiram dos casos de nefropatias crônicas adquiridas, já que mesmo associados a redução do volume renal e à modificações da dinâmica de filtração renal, produziriam alterações ultrassonográficas distintas de parênquima, usualmente bilaterais, e ocorreriam normalmente em animais idosos.…”

Section: Discussionunclassified

Renal Dysplasia in a Free-Living Giant Anteater Cub (Myrmecophaga tridactyla) - Ultrasonographic and Tomographic Aspects

Jaworski

Borba

Rezende

et al. 2021

Acta Scientiae. Vet.

View full text Add to dashboard Cite

Background: Renal dysplasia is a congenital disorder that occurs during differentiation of the renal parenchyma or as a consequence of a functional and/or structural obstruction of the lower urinary tract. In wild animals, this pathology has been reported in cynomolgus monkeys (Macaca fascicularis), golden hamsters (Mesocricetus auratus) and African elephants (Loxodanta africana). However, there are no reports of the disease in the giant anteater (Myrmecophaga tridactyla). Thus, this paper describes a case of renal dysplasia in a free-living giant anteater cub, which was sent to the wild animal clinic of the Federal University of Mato Grosso (UFMT) in Cuiabá, MT, Brazil. Case: The rescued animal had a good body condition score and clinical parameters within the normal range for the species. After a routine clinical evaluation, the anteater cub was subjected to radiography and ultrasound tests. Blood tests, serum tests for hepatic and renal profiles, urinalysis, urinary protein creatinine ratio, and chest X-rays did not reveal significant changes. However, the abdominal ultrasound examination revealed a volumetric loss of about 1.17 cm in length in the left kidney, and a renal length to aortic artery diameter ratio of approximately 2.8. This kidney showed irregular contours, loss of corticomedullary demarcation, with preserved echogenicity and cortical echotexture. The right kidney showed the standard size of the species, with a length of approximately 3.08 cm. In view of the suspicion of renal dysplasia, a contrast-enhanced CT scan was performed in order to assess the dynamics of uptake and excretion of the contrast medium in the affected kidney and in the ipsilateral collecting system. An examination of the tomographic images indicated that the volume of the left kidney was reduced, isodense in relation to the right kidney, with discrete and homogeneous uptake in all phases after administration of the contrast medium, no occurrence of nephrogram and pyelogram phases, or any detection of contrast in the corresponding ureter.Discussion: Giant anteaters (Myrmecophaga tridactyla) are animals classified as a species vulnerable to extinction. Today, most research involving this species focuses on its ecology, behavior, diet, morphology and parasitology, but little is known about the imaging aspects of the species or about congenital changes such as renal dysplasia. Although the definitive diagnosis of this pathology depends on a histopathological examination, the same diagnosis can be made with a wide margin of safety by assessing the epidemiological aspects and the dynamics of renal uptake of the contrast medium through computed tomography. In this analysis, both vascularization and renal filtration capacity can be assessed. Thus, based on CT imaging, it was concluded that this was a case of renal dysplasia, since the left kidney showed a discrete homogeneous uptake stable in both the arterial and venous phases, without producing any accumulation of contrast medium in the pelvic region or the collecting system, proving to be completely nonfunctional. These findings differ from cases of renal hypoplasia, which, although they reduce renal volume, do not cause structural changes in the renal parenchyma or disturbances in the filtration dynamics of contrast media. They also differ from cases of acquired chronic nephropathy, since, albeit associated with reduced renal volume and changes in renal filtration dynamics, they produce different parenchymal ultrasound changes that usually occur in elderly animals and generally produce bilateral lesions.

show abstract

Section: Discussionunclassified

Renal Dysplasia in a Free-Living Giant Anteater Cub (Myrmecophaga tridactyla) - Ultrasonographic and Tomographic Aspects

Jaworski

Borba

Rezende

et al. 2021

Acta Scientiae. Vet.

View full text Add to dashboard Cite

show abstract

“…This merge explains the successive stop of rotation along the longitudinal axis. 7,12 The blood supply is, in most cases, anomalous, being composed of several accessory vessels. 3 This variation was classified in different ways and is important for surgical programming.…”

Section: Discussionmentioning

confidence: 99%

“…3 In addition, the horseshoe kidney has also been related to a greater propensity to neoplasias, such as Wilms tumor, and to systemic malformations, such as Turner syndrome. 7 The blood supply to the horseshoe kidney is varied, with the arteries originating from branches of the aorta, from the inferior mesenteric artery, or from the iliac artery. 8 The identification of the anatomical variations of the renal arteries is of extreme importance for the performance of surgical procedures involving the renal arteries in order to prevent reckless lesions during surgery.…”

Section: Introductionmentioning

confidence: 99%

Hilar Arteriovenous Pattern in a Case of Horseshoe Kidney

et al. 2018

View full text Add to dashboard Cite

Horseshoe kidney is a poor congenital formation that results in the union of the lower poles of the kidneys through the fibrous isthmus that crosses the median line, with a prevalence of 0.25% (1 in 400 births), a higher rate in males (2:1 or 3:1), and an important variation in the arrangement of arteries and veins in the hilum. The present study aims to describe the arteriovenous pattern in the renal hilum in a case of horseshoe kidney. A conventional retroperitoneal dissection was performed in a 64-year-old female corpse of brown skin color, legally belonging to the Anatomy Laboratory of Unicastelo, Fernandópolis, state of São Paulo, Brazil, with causa mortis associated with uterine cancer. The dissection revealed a horseshoe kidney, with the right kidney measuring 5.69 cm, the left kidney measuring 11.65 cm, and the isthmus measuring 6.40 cm, and with the presence of a single right superior polar segmental artery (originated in the posterior aspect of the renal artery), of a double left superior polar segmental artery (originated in the renal artery, with one for each renal aspect), of one renal isthmus artery (originated in the posterior aspect of the abdominal aorta), and of one renal isthmus vein (left common iliac vein). Horseshoe kidney is a congenital abnormality whose arteries may originate from branches of the renal artery, of the inferior mesenteric artery, or of the iliac artery. Its veins drain into the renal vein, into the inferior vena cava, or into the iliac vein. It may be associated with hydronephrosis and nephroblastoma. However, no reports in the literature are found regarding the correlation with uterine cancer, highlighting the relevance of the hilar vascular pattern of the reported case.

show abstract

“…A DRPAD pode, ainda, estar associada a anomalias urogenitais, sendo a mais comum o rim em ferradura (6) . O rim em ferradura é uma alteração ocasionada por um defeito na fusão renal durante a quinta semana de gestação do período embrionário, acometendo aproximadamente 0,25% da população em geral e sendo mais prevalente em homens (2:1) (7)(8) . O mais comum é que a fusão renal ocorra no polo inferior (90% dos casos) e, na maioria dos casos, o istmo contém parênquima renal funcionante, gerando um desafio para separar os rins cirurgicamente de forma segura (8)(9) .…”

Section: Introductionunclassified

Rim Em Ferradura Em Paciente Com Doença Renal Policística: Relato De Caso

Ayub¹,

Brito²,

Bonfitto³

et al. 2017

ACS

View full text Add to dashboard Cite

Introdução: A doença renal policística é, em grande parte, um acometimento genético autossômico dominante com presença de cistos renais, podendo haver perda da função renal e outras manifestações, como cistos hepáticos, aneurisma cerebral e doenças cardiovasculares. O rim em ferradura é uma anomalia renal mais comum, ocasionada por um defeito na fusão durante a embriologia. É, em geral, assintomático, podendo estar associado com doença renal policística, nefrolitíase, hipertensão renovascular, entre outros. A associação entre as duas entidades é rara, sobretudo seu diagnóstico, quando na maioria dos casos, ocorre em exames de rotina. Objetivo: Relatar o caso raro de um paciente com rim em ferradura associado a doença renal policística. Materiais e Métodos: Revisão do prontuário, registro fotográfico dos métodos diagnósticos e revisão da literatura. Resultados: Paciente masculino, 76 anos, hipertenso e com hiperplasia prostática benigna foi admitido com oligúria, disúria, dor abdominal há cerca de uma semana com piora progressiva. Relatava ainda febre e uso de sonda vesical de demora para tratamento de retenção urinária há 9 meses. Após exames laboratoriais e tomografia de abdome, foi diagnosticado com pielonefrite aguda e doença renal e hepática policística associado com rim em ferradura. Conclusão: Obtivemos com o caso relatado e a revisão da literatura uma melhor caracterização dos sinais e sintomas do rim em ferradura em paciente com doença renal policística

show abstract

Anomalias congênitas do trato urinário superior: novas imagens das mesmas doenças

Cited by 11 publications

References 20 publications

Renal Dysplasia in a Free-Living Giant Anteater Cub (Myrmecophaga tridactyla) - Ultrasonographic and Tomographic Aspects

Renal Dysplasia in a Free-Living Giant Anteater Cub (Myrmecophaga tridactyla) - Ultrasonographic and Tomographic Aspects

Hilar Arteriovenous Pattern in a Case of Horseshoe Kidney

Rim Em Ferradura Em Paciente Com Doença Renal Policística: Relato De Caso

Contact Info

Product

Resources

About