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Jaturanratsamee K, Jiwaganont P, Sukumolanan P, Petchdee S. PKD1 gene mutation and ultrasonographic characterization in cats with renal cysts. F1000Res 2024; 12:760. [PMID: 39108347 PMCID: PMC11301141 DOI: 10.12688/f1000research.134906.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/16/2024] [Indexed: 08/10/2024] Open
Abstract
Background Polycystic kidney disease (PKD) has a complex phenotype partly explained by genetic variants related to this disease. Ultrasonography is a promising approach for defining clinical signs. This study aimed to assess kidney characteristics in cats with Polycystin-1 (PKD1) gene mutations and wild-type cats. Kidney characteristics were identified by ultrasonography. Methods A total of 108 cats of variable breeds aged an average of 37.01±3.50 months were included. Blood examination and biochemical tests were evaluated. For cystic formation, renal ultrasound was performed. The PKD1 gene mutation was identified via polymerase chain reaction (PCR) and DNA sequencing. Matrix correlation and effectiveness of ultrasound for PKD1 mutation detection were determined. Results The results showed that 19.44% of cats had PKD1 mutations, a high prevalence in Persian and Persian-related breed cats. Our results demonstrated the characteristics of kidneys in wild-type cats and cats with gene mutations. Based on ultrasonography results, there was an association between cats with gene mutations and cyst formation. The findings indicated that ultrasound did not detect cysts in cats aged 4-36 months, supporting the evidence that PKD1 gene mutations may not be present. This study found high sensitivity and renal specificity ultrasound for PKD1 heterozygous mutation. Moreover, cystic formation via renal ultrasound showed an increased risk for PKD1 mutation 2,623 times compared to normal kidneys. Conclusions Ultrasonographic examination, coupled with genetic investigations, may help to clarify the phenotypic variability of PKD1. The phenotypic profile of PKD1 will guide therapeutic outcomes and reduce the prevalence of PKD morbidity and mortality in cats.
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Affiliation(s)
- Kotchapol Jaturanratsamee
- Graduate School, Bio-Veterinary Science Program, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Bangkok, Thailand
| | - Palin Jiwaganont
- Graduate School, Veterinary Clinical Studies Program, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Bangkok, Thailand
| | - Pratch Sukumolanan
- Graduate School, Veterinary Clinical Studies Program, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Bangkok, Thailand
| | - Soontaree Petchdee
- Department of Large Animal and Wildlife Clinical Sciences, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Bangkok, Thailand
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Shitamori F, Nonogaki A, Motegi T, Matsumoto Y, Sakamoto M, Tanizawa Y, Nakamura Y, Yonezawa T, Momoi Y, Maeda S. Large-scale epidemiological study on feline autosomal dominant polycystic kidney disease and identification of novel PKD1 gene variants. J Feline Med Surg 2023; 25:1098612X231185393. [PMID: 37489504 PMCID: PMC10812055 DOI: 10.1177/1098612x231185393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/26/2023]
Abstract
OBJECTIVES Autosomal dominant polycystic kidney disease (ADPKD) is a common inherited disease in cats. In most cases, the responsible abnormality is a nonsense single nucleotide polymorphism in exon 29 of the PKD1 gene (chrE3:g.42858112C>A, the conventional PKD1 variant). The aim of this study was to conduct a large-scale epidemiological study of ADPKD caused by the conventional PKD1 variant in Japan and to search for novel polymorphisms by targeted resequencing of the PKD1 using a next-generation sequencer. METHODS A total of 1281 cats visiting the Veterinary Medical Center of the University of Tokyo were included in this study. DNA was extracted from the blood of each cat. We established a novel TaqMan real-time PCR genotyping assay for the conventional PKD1 variant, and all cases were examined for the presence of this variant. Targeted resequencing of all exons of the PKD1 was performed on the DNA of 23 cats with the conventional PKD1 variant, six cats diagnosed with cystic kidneys but without this variant, and 61 wild-type normal cats. RESULTS Among the 1281 cats examined in this study, 23 (1.8%) harboured the conventional PKD1 variant. The odds of having the conventional PKD1 variant were significantly higher in Persian cats, Scottish Folds and Exotic Shorthairs than in the other breeds, although the number of cases in each breed was small. Furthermore, we identified four variants unique to cats with cystic kidneys that were not found in wild-type normal cats, all of which were in exon 15. In particular, two (chrE:g.42848725delC, pGly1641fs and chrE:g.42850283C>T, pArg2162Trp) were candidate variants. CONCLUSIONS AND RELEVANCE This study revealed that the conventional PKD1 variant was prevalent in Scottish Fold, Persian and Exotic Shorthair breeds in Japan, and variants in exon 15 of PKD1, in addition to the conventional variant in exon 29, would be key factors in the pathogenesis of ADPKD in cats.
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Affiliation(s)
- Fumitaka Shitamori
- Department of Veterinary Clinical Pathobiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Ayaka Nonogaki
- Department of Veterinary Clinical Pathobiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Tomoki Motegi
- Veterinary Medical Center, The University of Tokyo, Tokyo, Japan
| | | | - Mika Sakamoto
- Department of Informatics, National Institute of Genetics, Research Organization of Information and Systems, Shizuoka, Japan
| | - Yasuhiro Tanizawa
- Department of Informatics, National Institute of Genetics, Research Organization of Information and Systems, Shizuoka, Japan
| | - Yasukazu Nakamura
- Department of Informatics, National Institute of Genetics, Research Organization of Information and Systems, Shizuoka, Japan
| | - Tomohiro Yonezawa
- Department of Veterinary Clinical Pathobiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Yasuyuki Momoi
- Department of Veterinary Clinical Pathobiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Shingo Maeda
- Department of Veterinary Clinical Pathobiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
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Moazezi Ghavihelm A, Jamshidi S, Ashrafi Tamai I, Zangisheh M. Molecular detection of polycystic kidney disease in Persian and Persian-related breeds in Iran. JFMS Open Rep 2022; 8:20551169211070991. [PMID: 35127116 PMCID: PMC8808032 DOI: 10.1177/20551169211070991] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/17/2021] [Indexed: 01/08/2023] Open
Abstract
Objectives This study was aimed at detecting feline autosomal dominant polycystic kidney disease in a population of Persian and Persian-related breeds by a molecular method in Iran. Methods Buccal swab samples were collected from 47 cats and examined with a touchdown PCR method. Additionally, partial sequencing was performed in two cats with bilateral renal cysts. Results Twenty-two cats (46.8%) were diagnosed as heterozygous for this mutation. Sequence analysis of two cats showed C to A point mutation in the PKD1 gene, as in previous studies. Conclusions and relevance Prevalence of this disease is high in Iran, highlighting the need for molecular screening tests before including cats in breeding programmes.
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Affiliation(s)
- Ali Moazezi Ghavihelm
- Department of Internal Medicine, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Shahram Jamshidi
- Department of Internal Medicine, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Iraj Ashrafi Tamai
- Department of Microbiology, College of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Mahsa Zangisheh
- Department of Surgery and Radiology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
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Guerra JM, Cardoso NC, Daniel AGT, Onuchic LF, Cogliati B. Prevalence of autosomal dominant polycystic kidney disease in Persian and Persian-related cats in Brazil. BRAZ J BIOL 2021; 81:392-397. [PMID: 32491055 DOI: 10.1590/1519-6984.227131] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Accepted: 01/21/2020] [Indexed: 11/22/2022] Open
Abstract
Autosomal dominant polycystic kidney disease (ADPKD) is the most common genetic disease in cats. However, scarce data on its prevalence are available in Brazil. Persian cats and Persian-related breeds were assessed by molecular genotyping for a C to A transversion in exon 29 of PKD1 gene to determine ADPKD prevalence in a Brazilian population. Genomic DNA extracted from peripheral whole blood or oral swabs samples was used to amplify exon 29 of PKD1 gene employing a PCR-RFLP methodology. From a total of 616 animals, 27/537 Persian and 1/17 Himalayan cats showed the single-nucleotide variant (C to A) at position 3284 in exon 29 of feline PKD1. This pathogenic variation has been identified only in heterozygous state. The prevalence of ADPKD in Persian cats and Persian-related breeds was 5.03% and 1.6%, respectively. There was no significant association between feline breed, gender or age with ADPKD prevalence. Of note, the observed ADPKD prevalence in Persian cats and Persian-related breeds in Brazil was lower than the ones reported in other parts of the world. This finding may be related to genetic counseling and consequent selection of ADPKD-free cats for reproduction.
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Affiliation(s)
- J M Guerra
- Laboratório de Patologia Morfológica e Molecular, Departamento de Patologia, Faculdade de Medicina Veterinária e Zootecnia - FMVZ, Universidade de São Paulo - USP, Av. Prof. Dr. Orlando Marques de Paiva, 87, Cidade Universitária, CEP 05508-270, São Paulo, SP, Brasil
| | - N C Cardoso
- Laboratório de Patologia Morfológica e Molecular, Departamento de Patologia, Faculdade de Medicina Veterinária e Zootecnia - FMVZ, Universidade de São Paulo - USP, Av. Prof. Dr. Orlando Marques de Paiva, 87, Cidade Universitária, CEP 05508-270, São Paulo, SP, Brasil
| | - A G T Daniel
- Gattos - Clínica Especializada em Medicina Felina, Av. Vereador José Diniz, 3165, Campo Belo, CEP 04603-002, São Paulo, SP, Brasil
| | - L F Onuchic
- Faculdade de Medicina, Universidade de São Paulo - USP, Av. Dr. Arnaldo, 455, Cerqueira César, CEP 01246-903, São Paulo, SP, Brasil
| | - B Cogliati
- Laboratório de Patologia Morfológica e Molecular, Departamento de Patologia, Faculdade de Medicina Veterinária e Zootecnia - FMVZ, Universidade de São Paulo - USP, Av. Prof. Dr. Orlando Marques de Paiva, 87, Cidade Universitária, CEP 05508-270, São Paulo, SP, Brasil
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Sim Lam PPL, Reduan MFH, Jasni S, Shaari R, Shaharulnizim N, Nordin ML, Abd Rahman A, Roslan NS. Polycystic kidney disease concurrent with feline parvovirus and bacterial infections in domestic shorthair cat: a case report. COMPARATIVE CLINICAL PATHOLOGY 2020; 29:1283-1287. [PMID: 33013278 PMCID: PMC7521566 DOI: 10.1007/s00580-020-03170-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Accepted: 09/22/2020] [Indexed: 11/28/2022]
Abstract
Feline polycystic kidney disease (PKD) is an inherited disorder caused by the mutation of PKD1 gene that eventually lead to the development of chronic kidney disease. The latter condition causes hypertension and eventually progress into congestive heart failure. Feline parvovirus (FPV) is a highly contagious and often fatal disease infecting cats and other members of Felidae. An 8-month-old female domestic shorthair cat was presented with complaint of wound dehiscence a day after ovarian hysterectomy procedure. The wound at the suture site appeared necrotic, purulent with foul smell. The cat was found to have diarrhoea during the fixation of suture breakdown and, later, was tested positive with parvovirus infection. Complete blood count revealed anaemia, neutrophilia, lymphopenia and thrombocytosis. Biochemistry profiles showed hypoproteinaemia and elevated of urea and creatinine. The cat was hospitalised, and symptomatic treatments were given. During hospitalisation, the cat showed symptoms of polydipsia and polyuria and found dead 2 days later. Post-mortem findings demonstrated the cat had oral ulceration, thoracic effusion, fibrinopleuropneumonia, pericardial effusion, left ventricular hypertrophy and right ventricular dilation, chronic passive liver congestion, mesenteric lymphadenomegaly, intestinal haemorrhage, adrenomegaly and polycystic kidney. Histopathological evaluation revealed fibrinous pleuropneumonia, pulmonary atelectasis, emphysema and oedema, hypertrophic cardiomyopathy, hepatic necrosis, splenic necrosis, intestinal necrosis, renal necrosis and renal polycystic. Staphylococcus aureus and Escherichia coli were isolated from bronchus swab and intestinal segment, respectively. Polymerase chain reaction (PCR) revealed parvovirus infection. The cat was definitely diagnosed with polycystic kidney disease concurrent with parvoviral and secondary bacterial infections.
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Affiliation(s)
- Pauline Poh Ling Sim Lam
- Department of Para Clinical Studies, Faculty of Veterinary Medicine, Universiti Malaysia Kelantan, Pengkalan Chepa, 16100 Kota Bharu, Kelantan Malaysia
| | - Mohd Farhan Hanif Reduan
- Department of Para Clinical Studies, Faculty of Veterinary Medicine, Universiti Malaysia Kelantan, Pengkalan Chepa, 16100 Kota Bharu, Kelantan Malaysia
| | - Sabri Jasni
- Department of Para Clinical Studies, Faculty of Veterinary Medicine, Universiti Malaysia Kelantan, Pengkalan Chepa, 16100 Kota Bharu, Kelantan Malaysia
| | - Rumaizi Shaari
- Department of Clinical Studies, Faculty of Veterinary Medicine, Universiti Malaysia Kelantan, Pengkalan Chepa, 16100 Kota Bharu, Kelantan Malaysia
| | - Nurshahirah Shaharulnizim
- Department of Clinical Studies, Faculty of Veterinary Medicine, Universiti Malaysia Kelantan, Pengkalan Chepa, 16100 Kota Bharu, Kelantan Malaysia
| | - Muhammad Luqman Nordin
- Department of Clinical Studies, Faculty of Veterinary Medicine, Universiti Malaysia Kelantan, Pengkalan Chepa, 16100 Kota Bharu, Kelantan Malaysia
| | - Aziz Abd Rahman
- Department of Para Clinical Studies, Faculty of Veterinary Medicine, Universiti Malaysia Kelantan, Pengkalan Chepa, 16100 Kota Bharu, Kelantan Malaysia
| | - Nadiah Syuhada Roslan
- Department of Clinical Studies, Faculty of Veterinary Medicine, Universiti Malaysia Kelantan, Pengkalan Chepa, 16100 Kota Bharu, Kelantan Malaysia
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Griffin S. Feline abdominal ultrasonography: what's normal? what's abnormal? The kidneys and perinephric space. J Feline Med Surg 2020; 22:409-427. [PMID: 32326858 PMCID: PMC11132528 DOI: 10.1177/1098612x20917598] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
PRACTICAL RELEVANCE Abdominal ultrasound plays a vital role in the diagnostic work-up of many cats presenting to general and specialist practitioners. Ultrasound examination of the kidneys and perinephric space can provide important information on several conditions including chronic renal disease, hydronephrosis and perinephric pseudocyst formation. CLINICAL CHALLENGES Despite ultrasonography being a commonly used modality, many practitioners are not comfortable performing an ultrasound examination or interpreting the resulting images. Even for the experienced ultrasonographer, differentiating between incidental findings, such as a medullary rim sign, and pathological changes can be challenging. AIM This review, part of an occasional series on feline abdominal ultrasonography, discusses ultrasonographic examination of the normal and diseased kidney and perinephric space. Aimed at general practitioners who wish to improve their knowledge of and confidence in feline abdominal ultrasound, this review is accompanied by high-resolution images and videos available online as supplementary material. A subsequent article will address ultrasonography of the collecting system including the renal pelvis and urinary bladder. EQUIPMENT Ultrasound facilities are readily available to most practitioners, although use of ultrasonography as a diagnostic tool is highly dependent on operator experience. EVIDENCE BASE Information provided in this article is drawn from the published literature and the author's own clinical experience.
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Affiliation(s)
- Sally Griffin
- Radiology Department, Willows Veterinary Centre and Referral Service, Highlands Road, Shirley, Solihull B90 4NH, UK
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Yu Y, Shumway KL, Matheson JS, Edwards ME, Kline TL, Lyons LA. Kidney and cystic volume imaging for disease presentation and progression in the cat autosomal dominant polycystic kidney disease large animal model. BMC Nephrol 2019; 20:259. [PMID: 31299928 PMCID: PMC6625046 DOI: 10.1186/s12882-019-1448-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 07/01/2019] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Approximately 30% of Persian cats have a c.10063C > A variant in polycystin 1 (PKD1) homolog causing autosomal dominant polycystic kidney disease (ADPKD). The variant is lethal in utero when in the homozygous state and is the only ADPKD variant known in cats. Affected cats have a wide range of progression and disease severity. However, cats are an overlooked biomedical model and have not been used to test therapeutics and diets that may support human clinical trials. To reinvigorate the cat as a large animal model for ADPKD, the efficacy of imaging modalities was evaluated and estimates of kidney and fractional cystic volumes (FCV) determined. METHODS Three imaging modalities, ultrasonography, computed tomography (CT), and magnetic resonance imaging examined variation in disease presentation and disease progression in 11 felines with ADPKD. Imaging data was compared to well-known biomarkers for chronic kidney disease and glomerular filtration rate. Total kidney volume, total cystic volume, and FCV were determined for the first time in ADPKD cats. Two cats had follow-up examinations to evaluate progression. RESULTS FCV measurements were feasible in cats. CT was a rapid and an efficient modality for evaluating therapeutic effects that cause alterations in kidney volume and/or FCV. Biomarkers, including glomerular filtration rate and creatinine, were not predictive for disease progression in feline ADPKD. The wide variation in cystic presentation suggested genetic modifiers likely influence disease progression in cats. All imaging modalities had comparable resolutions to those acquired for humans, and software used for kidney and cystic volume estimates in humans proved useful for cats. CONCLUSIONS Routine imaging protocols used in veterinary medicine are as robust and efficient for evaluating ADPKD in cats as those used in human medicine. Cats can be identified as fast and slow progressors, thus, could assist with genetic modifier discovery. Software to measure kidney and cystic volume in human ADPKD kidney studies is applicable and efficient in cats. The longer life and larger kidney size span than rodents, similar genetics, disease presentation and progression as humans suggest cats are an efficient biomedical model for evaluation of ADPKD therapeutics.
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Affiliation(s)
- Yoshihiko Yu
- Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, MO, USA.,Laboratory of Veterinary Radiology, Nippon Veterinary and Life Science University, Tokyo, Japan
| | - Kate L Shumway
- Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, MO, USA
| | - Jodi S Matheson
- Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, MO, USA
| | - Marie E Edwards
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN, USA
| | - Timothy L Kline
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN, USA.,Department of Radiology, Mayo Clinic, Rochester, MN, USA
| | - Leslie A Lyons
- Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, MO, USA.
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Guerra JM, Freitas MF, Daniel AGT, Pellegrino A, Cardoso NC, de Castro I, Onuchic LF, Cogliati B. Age-based ultrasonographic criteria for diagnosis of autosomal dominant polycystic kidney disease in Persian cats. J Feline Med Surg 2019; 21:156-164. [PMID: 29652208 PMCID: PMC10814611 DOI: 10.1177/1098612x18764591] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2024]
Abstract
OBJECTIVES The aim of this study was to establish ultrasound criteria for the diagnosis of autosomal dominant polycystic kidney disease (ADPKD) in Persian cats. METHODS Eighty-two Persian cats were assessed using renal ultrasound and genotyped for the C→A transversion in exon 29 of PKD1. The animals were also submitted to hematological characterization, serum biochemistry analyses and urinalysis. RESULTS Age, sex and neutering status did not differ between ADPKD (n = 12) and non-ADPKD (n = 70) cats. After integrated molecular genetics/ultrasonographic analysis, the presence of at least one renal cyst was sufficient to establish a diagnosis of ADPKD in animals up to 15 months of age. Two or more cysts were required for diagnosis in cats aged 16-32 months, and at least three cysts warranted diagnosis of ADPKD in animals aged 33-49 months. Finally, four or more cysts led to diagnosis in cats aged 50-66 months. Although cats with ADPKD exhibited higher serum calcium levels than non-affected cats, hematological, urinalysis and other biochemical parameters did not differ between the two groups. CONCLUSIONS AND RELEVANCE Integrated analyses of imaging and molecular genetics data enabled, for the first time, the establishment of age-based ultrasonographic criteria for the diagnosis of ADPKD in Persian cats. The development of imaging criteria is particularly relevant and useful in the clinical setting given the current limitations to access and the cost of molecular genetics-based diagnostic tests.
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Affiliation(s)
- Juliana M Guerra
- Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
- Nucleus of Quantitative Pathology, Pathology Center, Adolfo Lutz Institute, São Paulo, Brazil
| | - Mariana F Freitas
- Department of Clinical Medicine, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | | | - Arine Pellegrino
- Department of Clinical Medicine, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
- Gattos – Specialized Feline Medicine Clinic, São Paulo, Brazil
| | - Natália C Cardoso
- Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Isac de Castro
- Disciplines of Molecular Medicine and Nephrology, School of Medicine, University of São Paulo, São Paulo, Brazil
| | - Luiz F Onuchic
- Disciplines of Molecular Medicine and Nephrology, School of Medicine, University of São Paulo, São Paulo, Brazil
| | - Bruno Cogliati
- Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
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McAloney CA, Sharkey LC, Feeney DA, Seelig DM. Diagnostic utility of renal fine-needle aspirate cytology and ultrasound in the cat. J Feline Med Surg 2018; 20:544-553. [PMID: 28718733 PMCID: PMC11104075 DOI: 10.1177/1098612x17720041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2024]
Abstract
Objectives The primary objective of this study was to retrospectively assess the diagnostic utility of feline renal fine-needle aspiration cytology by assessing diagnostic yield, cytologic characteristics and diagnostic accuracy. The secondary objective was to characterize ultrasonographic features of sampled kidneys to determine if they influenced diagnostic yield. Methods Slides, images and patient data were collected from the University of Minnesota Veterinary Medical Center database. Slides were designated as diagnostic or non-diagnostic. Non-diagnostic slides were used in calculating diagnostic yield and excluded from other analysis. Slides were evaluated for cytologic characteristics and assigned a single primary diagnosis. Ultrasound still images were evaluated for descriptive characteristics and characteristics of specific lesions were described. Cases with confirmatory testing were used to determine diagnostic sensitivity, specificity and positive and negative predictive values for detecting neoplasia. Results Of 96 cytologic submissions available for review, diagnostic yield was 68%; 48% of samples were at least moderately cellular. Of 87 cases with ultrasound data, kidneys showing subcapsular renal infiltrate, diffuse renal enlargement without pelvic dilation and infiltrative/nodular change were more likely to yield diagnostic samples. Of 12 confirmed cases, cytology was 100% sensitive and specific for the detection of neoplasia (four round-cell tumors and two carcinomas). Three cases with non-neoplastic histologic diagnoses were considered cytologically normal, two incorrectly diagnosed the pathology present, and one correctly diagnosed the pathology. While some imaging characteristics were more commonly seen in neoplastic vs non-neoplastic lesions, the sample size was insufficient for definitive correlation. Conclusions and relevance This is the first major analysis of feline ultrasound-guided renal fine-needle aspiration cytology. This technique generates adequate samples for interpretation at rates comparable to other soft tissues and is most useful in the diagnosis of neoplasia. Some imaging characteristics are indicative of the likelihood of obtaining an adequate sample for cytologic interpretation.
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Affiliation(s)
- Camille A McAloney
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine/University of Minnesota, St Paul, MN, USA
| | - Leslie C Sharkey
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine/University of Minnesota, St Paul, MN, USA
| | - Daniel A Feeney
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine/University of Minnesota, St Paul, MN, USA
| | - Davis M Seelig
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine/University of Minnesota, St Paul, MN, USA
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Debruyn K, Haers H, Combes A, Paepe D, Peremans K, Vanderperren K, Saunders JH. Ultrasonography of the feline kidney: Technique, anatomy and changes associated with disease. J Feline Med Surg 2012; 14:794-803. [PMID: 23087005 PMCID: PMC11112170 DOI: 10.1177/1098612x12464461] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
PRACTICAL RELEVANCE Ultrasonography is an important tool for the detection of kidney disorders, which are among the most common health problems suffered by cats. It is more accurate than radiography for this purpose and is considered to be the reference modality for imaging the feline kidney, providing excellent visualisation of renal size, shape and internal architecture. Compared with more advanced imaging modalities, such as computed tomography or magnetic resonance imaging, ultrasonography is more accessible, less expensive, does not require general anaesthesia and allows real-time procedures to be performed. CLINICAL CHALLENGES On ultrasound examination, focal or multifocal disorders may be readily identified, but diffuse changes are more challenging. B-mode ultrasonography is of limited use for differentiating between benign and malignant focal lesions. However, based on the presence and pattern of vascularity as an indicator of malignancy, contrast-enhanced ultrasonography allows distinction between benign and malignant focal renal lesions. AUDIENCE This review provides a framework for the ultrasonographic approach to feline renal and perirenal disorders for the general practitioner. EVIDENCE BASE Drawing on current literature relating to ultrasonographic examination of feline kidneys, the aim is to summarise ultrasonographic technique, anatomy and changes associated with renal and perirenal diseases.
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Affiliation(s)
- Katrien Debruyn
- Department of Medical Imaging and Orthopedics of Small Animals, Faculty of VeterinaryMedicine, University of Ghent, Salisburylaan 133, 9820 Merelbeke, Belgium.
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Paepe D, Saunders JH, Bavegems V, Paes G, Peelman LJ, Makay C, Daminet S. Screening of ragdoll cats for kidney -disease: a retrospective evaluation. J Small Anim Pract 2012; 53:572-7. [DOI: 10.1111/j.1748-5827.2012.01254.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- D. Paepe
- Department of Small Animal Medicine and Clinical Biology, Faculty of Veterinary Medicine; Ghent University; Salisburylaan 133; B-9820; Merelbeke; Belgium
| | | | - V. Bavegems
- Department of Small Animal Medicine and Clinical Biology, Faculty of Veterinary Medicine; Ghent University; Salisburylaan 133; B-9820; Merelbeke; Belgium
| | - G. Paes
- Department of Small Animal Medicine and Clinical Biology, Faculty of Veterinary Medicine; Ghent University; Salisburylaan 133; B-9820; Merelbeke; Belgium
| | | | - C. Makay
- Department of Small Animal Medicine and Clinical Biology, Faculty of Veterinary Medicine; Ghent University; Salisburylaan 133; B-9820; Merelbeke; Belgium
| | - S. Daminet
- Department of Small Animal Medicine and Clinical Biology, Faculty of Veterinary Medicine; Ghent University; Salisburylaan 133; B-9820; Merelbeke; Belgium
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