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Glahn I, Haghofer A, Donovan TA, Degasperi B, Bartel A, Kreilmeier-Berger T, Hyndman PS, Janout H, Assenmacher CA, Bartenschlager F, Bolfa P, Dark MJ, Klang A, Klopfleisch R, Merz S, Richter B, Schulman FY, Ganz J, Scharinger J, Aubreville M, Winkler SM, Bertram CA. Automated Nuclear Morphometry: A Deep Learning Approach for Prognostication in Canine Pulmonary Carcinoma to Enhance Reproducibility. Vet Sci 2024; 11:278. [PMID: 38922025 PMCID: PMC11209399 DOI: 10.3390/vetsci11060278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Revised: 06/05/2024] [Accepted: 06/10/2024] [Indexed: 06/27/2024] Open
Abstract
The integration of deep learning-based tools into diagnostic workflows is increasingly prevalent due to their efficiency and reproducibility in various settings. We investigated the utility of automated nuclear morphometry for assessing nuclear pleomorphism (NP), a criterion of malignancy in the current grading system in canine pulmonary carcinoma (cPC), and its prognostic implications. We developed a deep learning-based algorithm for evaluating NP (variation in size, i.e., anisokaryosis and/or shape) using a segmentation model. Its performance was evaluated on 46 cPC cases with comprehensive follow-up data regarding its accuracy in nuclear segmentation and its prognostic ability. Its assessment of NP was compared to manual morphometry and established prognostic tests (pathologists' NP estimates (n = 11), mitotic count, histological grading, and TNM-stage). The standard deviation (SD) of the nuclear area, indicative of anisokaryosis, exhibited good discriminatory ability for tumor-specific survival, with an area under the curve (AUC) of 0.80 and a hazard ratio (HR) of 3.38. The algorithm achieved values comparable to manual morphometry. In contrast, the pathologists' estimates of anisokaryosis resulted in HR values ranging from 0.86 to 34.8, with slight inter-observer reproducibility (k = 0.204). Other conventional tests had no significant prognostic value in our study cohort. Fully automated morphometry promises a time-efficient and reproducible assessment of NP with a high prognostic value. Further refinement of the algorithm, particularly to address undersegmentation, and application to a larger study population are required.
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Affiliation(s)
- Imaine Glahn
- Institute of Pathology, University of Veterinary Medicine Vienna, 1210 Vienna, Austria
| | - Andreas Haghofer
- Bioinformatics Research Group, University of Applied Sciences Upper Austria, 4232 Hagenberg, Austria
- Department of Computer Science, Johannes Kepler University, 4040 Linz, Austria
| | - Taryn A. Donovan
- Department of Anatomic Pathology, The Schwarzman Animal Medical Center, New York, NY 10065, USA
| | - Brigitte Degasperi
- University Clinic for Small Animals, University of Veterinary Medicine Vienna, 1210 Vienna, Austria
| | - Alexander Bartel
- Institute for Veterinary Epidemiology and Biostatistics, Freie Universität Berlin, 14163 Berlin, Germany
| | | | - Philip S. Hyndman
- Department of Anatomic Pathology, The Schwarzman Animal Medical Center, New York, NY 10065, USA
| | - Hannah Janout
- Bioinformatics Research Group, University of Applied Sciences Upper Austria, 4232 Hagenberg, Austria
- Department of Computer Science, Johannes Kepler University, 4040 Linz, Austria
| | - Charles-Antoine Assenmacher
- Comparative Pathology Core, Department of Pathobiology, University of Pennsylvania, Philadelphia, PA 19104, USA
| | | | - Pompei Bolfa
- Department of Biomedical Sciences, Ross University School of Veterinary Medicine, Basseterre P.O. Box 334, Saint Kitts and Nevis
| | - Michael J. Dark
- College of Veterinary Medicine, University of Florida, Gainesville, FL 32611, USA
| | - Andrea Klang
- Institute of Pathology, University of Veterinary Medicine Vienna, 1210 Vienna, Austria
| | - Robert Klopfleisch
- Institute of Veterinary Pathology, Freie Universität Berlin, 14163 Berlin, Germany
| | - Sophie Merz
- IDEXX Vet Med Labor GmbH, 70806 Kornwestheim, Germany
| | - Barbara Richter
- Institute of Pathology, University of Veterinary Medicine Vienna, 1210 Vienna, Austria
| | - F. Yvonne Schulman
- Antech Diagnostics, Mars Petcare Science and Diagnostics, Fountain Valley, CA 92708, USA
| | - Jonathan Ganz
- Department of Computer Science, Technische Hochschule Ingolstadt, 85049 Ingolstadt, Germany
| | - Josef Scharinger
- Department of Computer Science, Johannes Kepler University, 4040 Linz, Austria
| | - Marc Aubreville
- Department of Computer Science, Technische Hochschule Ingolstadt, 85049 Ingolstadt, Germany
| | - Stephan M. Winkler
- Bioinformatics Research Group, University of Applied Sciences Upper Austria, 4232 Hagenberg, Austria
- Department of Computer Science, Johannes Kepler University, 4040 Linz, Austria
| | - Christof A. Bertram
- Institute of Pathology, University of Veterinary Medicine Vienna, 1210 Vienna, Austria
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Fischer BM, Kessler M, Braus BK. Eyelid and conjunctival mast cell tumors: A retrospective study of 26 dogs and 8 cats. Vet Ophthalmol 2024; 27:256-265. [PMID: 37902116 DOI: 10.1111/vop.13152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 09/26/2023] [Accepted: 09/26/2023] [Indexed: 10/31/2023]
Abstract
OBJECTIVE The objective of the study was to describe clinical and histologic characteristics of eyelid (LMCT) and conjunctival (CMCT) mast cell tumors in dogs and cats presented to a referral clinic in Germany. ANIMAL STUDIED Medical records were reviewed to identify dogs and cats diagnosed with LMCTs or CMCTs between 2006 and 2020. RESULTS LMCT were diagnosed in 31 patients and were cutaneous (n = 28; 20 dogs and 8 cats) or subcutaneous (three dogs). Five cases involved the mucocutaneous junction (four dogs, one cat). CMCTs occurred only in dogs (n = 3). At the time of presentation two of the four canine LMCT cases involving the mucocutaneous junction had metastasized to a mandibular lymph node. When applying the Kiupel system, both these cases were categorized as high grade. 85.7% (18/21) of the canine (19 cutaneous and 2 subcutaneous) LMCT and all CMCT cases were categorized as Kiupel low grade. No local recurrences occurred in all LMCT cases in which clean surgical margins were obtained (n = 18, mean surgical margin width: dogs 9.4 mm, cats 3.8 mm). Two cats (2/4) and four dogs (4/7) with questionable or incomplete surgical margins experienced local recurrences (mean time to recurrence of 180 and 637 days in dogs and cats, respectively). CONCLUSION Recurrence of low-grade LMCTs and CMCTs following excision with clean margins is rare. Tumors involving the mucocutaneous junction may be of higher grade and prone to lymphatic metastasis.
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Affiliation(s)
- Britta M Fischer
- Department of Ophthalmology, Small Animal Clinic Hofheim, Hofheim, Hesse, Germany
| | - Martin Kessler
- Department of Oncology, Small Animal Clinic Hofheim, Hofheim, Hesse, Germany
| | - Barbara K Braus
- Department of Ophthalmology, Small Animal Clinic Hofheim, Hofheim, Hesse, Germany
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Bertram CA, Donovan TA, Bartel A. Mitotic activity: A systematic literature review of the assessment methodology and prognostic value in feline tumors. Vet Pathol 2024:3009858241239566. [PMID: 38533803 DOI: 10.1177/03009858241239566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2024]
Abstract
Increased proliferation is a driver of tumorigenesis, and quantification of mitotic activity is a standard task for prognostication. This systematic review is an analysis of all available references on mitotic activity in feline tumors to provide an overview of the assessment methods and prognostic value. A systematic literature search in PubMed and Scopus and a nonsystematic search in Google Scholar were conducted. All articles on feline tumors that correlated mitotic activity with patient outcome were identified. Data analysis revealed that of the 42 eligible articles, mitotic count (MC, mitotic figures/tumor area) was evaluated in 39 studies, and mitotic index (MI, mitotic figures/tumor cells) in 3 studies. The risk of bias was considered high for most studies (26/42, 62%) based on small study populations, insufficient details of the MC/MI methods, and lack of statistical measures for diagnostic accuracy or effect on outcome. The MC/MI methods varied between studies. A significant association of MC with survival was determined in 20 of 28 (71%) studies (10 studies evaluated other outcome metrics or provided individual patient data), while 1 study found an inverse effect. Three tumor types had at least 4 studies, and a prognostic association with survival was found in 5 of 6 studies on mast cell tumors, 5 of 5 on mammary tumors, and 3 of 4 on soft-tissue sarcomas. MI was shown to correlate with survival for mammary tumors by 2 research groups; however, comparisons to MC were not conducted. Further studies with standardized mitotic activity methods and appropriate statistical analysis for discriminant ability of patient outcome are needed to infer the prognostic value of MC and MI.
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Arz R, Chiti LE, Krudewig C, Grieco V, Meier V, Fejös C, Stefanello D, Nolff MC. Lymph node metastasis in feline cutaneous low-grade mast cell tumours. J Feline Med Surg 2023; 25:1098612X221138468. [PMID: 36638145 PMCID: PMC10812050 DOI: 10.1177/1098612x221138468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
OBJECTIVES This retrospective study aimed to determine the incidence of nodal metastatic disease in cats affected by low-grade cutaneous mast cell tumours (MCTs) in our study population. METHODS The clinical records of two centres were retrospectively searched for cats with cutaneous MCTs that had undergone lymphadenectomy of enlarged and non-enlarged lymph nodes. All primary tumours were histologically reviewed by two experienced pathologists and graded as high- or low-grade based on the grading system for feline cutaneous MCT. We graded the lymph nodes based on the grading scheme used for canine MCTs and considered HN2 and HN3 nodes to be metastatic. The number of patients with nodal metastasis was calculated. RESULTS We identified 17 cats with cutaneous MCT resection and concurrent lymphadenectomy. All 21 MCTs were graded as low grade and 30 nodes were removed, with 12 being considered early or overtly metastatic (HN2 or HN3, respectively). Based on nodal status, 10/17 (59%) cats were affected by nodal metastasis in our population. CONCLUSIONS AND RELEVANCE In contrast to previous reports, high percentage of cats with cutaneous MCTs in which lymphadenectomy was performed were presented with metastatic lymph nodes. The clinical relevance of this finding and a potential benefit of lymphadenectomy must be determined in future studies.
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Affiliation(s)
- Raphael Arz
- Clinic for Small Animal Surgery, Department for Small Animals, Vetsuisse Faculty, University of Zurich, Switzerland
| | - Lavinia E Chiti
- Clinic for Small Animal Surgery, Department for Small Animals, Vetsuisse Faculty, University of Zurich, Switzerland
| | - Christiane Krudewig
- Institute of Veterinary Pathology, Department for Small Animals, Vetsuisse Faculty, University of Zurich, Switzerland
| | - Valeria Grieco
- Department of Veterinary Medicine and Animal Science, University of Milan, Lodi, Italy
| | - Valeria Meier
- Division of Radiation Oncology, Department for Small Animals, Vetsuisse Faculty, University of Zurich, Switzerland
| | - Csilla Fejös
- Division of Radiation Oncology, Department for Small Animals, Vetsuisse Faculty, University of Zurich, Switzerland
| | - Damiano Stefanello
- Department of Veterinary Medicine and Animal Science, University of Milan, Lodi, Italy
| | - Mirja C Nolff
- Clinic for Small Animal Surgery, Department for Small Animals, Vetsuisse Faculty, University of Zurich, Switzerland
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Chiti LE, Gariboldi EM, Stefanello D, De Zani D, Grieco V, Nolff MC. Sentinel Lymph Node Mapping and Biopsy in Cats with Solid Malignancies: An Explorative Study. Animals (Basel) 2022; 12:3116. [PMID: 36428344 PMCID: PMC9686746 DOI: 10.3390/ani12223116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 11/09/2022] [Accepted: 11/09/2022] [Indexed: 11/15/2022] Open
Abstract
There is increasing evidence on the utility of sentinel lymph node (SLN) biopsy (SLNB) for the staging of dogs with various malignancies; however, comparable information is missing in cats. This multi-institutional study aims at reporting the feasibility and detection rate of SLNB guided by lymphoscintigraphy and the blue dye or near-infrared fluorescent lymphography (NIRF-L) in cats with solid tumors. In total, 12 cats presented with 14 solid malignancies that underwent curative-intent surgical excision of the primary tumor and SLNB were retrospectively enrolled. The mapping technique used, location and number of SLN, correspondence with the regional lymph node (RLN), and histological status of the SLN were retrieved. The detection rate and complications of SLNB were also recorded. NIRF-L was performed in 64.3% of tumors and lymphoscintigraphy in 35.7%. The detection rate was 100% for both techniques. The SLN did not correspond (fully or partially) to the RLN in 71.4% of cases, with multiple SLN being excised in 9/14 tumors. No complications related to SLNB were recorded. At histopathology, metastases were identified in 41.7% of cats, all with mast cell tumors (MCT). SLNB guided by NIRF-L or lymphoscintigraphy is feasible and safe in cats with solid tumors and should be suggested for correct tumor staging in cats, especially with MCT.
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Affiliation(s)
- Lavinia Elena Chiti
- Clinic for Smal Animals Surgery, Vetsuisse Faculty, University of Zurich, CH-8057 Zurich, Switzerland
| | - Elisa Maria Gariboldi
- Department of Veterinary Medicine and Animal Sciences, Università degli Studi di Milano, 26900 Lodi, Italy
| | - Damiano Stefanello
- Department of Veterinary Medicine and Animal Sciences, Università degli Studi di Milano, 26900 Lodi, Italy
| | - Donatella De Zani
- Department of Veterinary Medicine and Animal Sciences, Università degli Studi di Milano, 26900 Lodi, Italy
| | - Valeria Grieco
- Department of Veterinary Medicine and Animal Sciences, Università degli Studi di Milano, 26900 Lodi, Italy
| | - Mirja Christine Nolff
- Clinic for Smal Animals Surgery, Vetsuisse Faculty, University of Zurich, CH-8057 Zurich, Switzerland
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Vet-OncoNet: Malignancy Analysis of Neoplasms in Dogs and Cats. Vet Sci 2022; 9:vetsci9100535. [PMID: 36288148 PMCID: PMC9611943 DOI: 10.3390/vetsci9100535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 09/21/2022] [Accepted: 09/22/2022] [Indexed: 12/02/2022] Open
Abstract
Simple Summary An overview analysis of tumors in dogs and cats, dividing them into malignant and benign, may provide previously unknown information about the biological behavior of tumors in these species and may serve many veterinarians as a support for clinical decision making. Based on a sample of 16,272 cancer records, including 3266 cats and 13,006 dogs, the analysis found that cats have a fourfold risk of malignant tumors, as in some topographies. Sex appears to play a role in the malignancy only in dogs. Some dog breeds (Pit bull and Boxer) have a higher risk of malignant tumors as opposed to Shih tzu and Yorkshire terrier. District of residence was not relevant in predicting malignancy risk. Most importantly, the risk of malignant tumors increases by 20% every three years. Abstract Analysis of canine and feline tumor malignancy data can help clinicians identify high-risk patients and make more accurate decisions. Based on a sample of 16,272 cancer records, including 3266 cats and 13,006 dogs, collected from January 2019 to December 2021 in the Vet-OncoNet Network database, this study aimed to compare the tumor malignancy profile between cats and dogs, considering animal-related factors (sex, age, and breed), topography, and geographic location using a mixed-effects logistic regression model. Cats had a higher proportion of malignant tumors (78.7%) than dogs (46.2%), and the malignancy profile was very different regarding tumors’ topographies. The mean age of malignant tumors occurred eight months later than benign ones (9.1, SD = 3.4; 9.8, SD = 3.2), in general. Species (OR = 3.96, 95%CI 3.57: 4.39) and topography (MOR = 4.10) were the two most important determinants of malignancy risk. Female dogs had a higher risk than male dogs (OR = 1.19, 95%CI 1.08: 1.31), which does not appear to be the case in cats (OR = 0.98, 95%CI 0.77: 1.23). Breed contributed significantly to differences in malignancy risk in dogs (MOR = 1.56), particularly in pit bulls and boxers. District of residence was not so relevant in predicting malignancy risk (MOR = 1.14). In both species, the risk of malignancy increased by approximately 20% every three years. It could be hypothesized that species differences in genetic structure may contribute to tumor malignancy.
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Smedley RC, Stedman NL, Kiupel M. Cutaneous and splenic mastocytosis in a juvenile Malayan tiger. J Vet Diagn Invest 2022; 34:288-291. [PMID: 35075959 PMCID: PMC8921805 DOI: 10.1177/10406387221074709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
A male Malayan tiger cub developed well-circumscribed, erythematous, alopecic lesions on the face, torso, and paws when 1-wk-old. Biopsies of a torso lesion and a right front paw lesion at 1-mo-old confirmed cutaneous mast cell tumors (MCTs). MCTs on the paws grew into pendulous masses up to 6.5 cm in diameter by 3-mo-old, but those on the face and torso regressed. Fine-needle aspiration of the spleen at 3-mo-old revealed marked mast cell infiltration. The spleen and the right paw cutaneous MCT were removed; the paw MCT recurred within 7 d. A 12-bp tandem duplication, suggesting a somatic mutation, was identified in exon 8 of c-KIT in DNA extracted from the cutaneous MCT on the right paw and from one over the torso, but not from the spleen. Remaining MCTs on the paws regressed slowly following splenectomy and had completely regressed by 1-y-old. At 7-y-old, there was no recurrence of any mast cell disease. Mast cell disease in this tiger cub is similar to a report in a domestic kitten and to pediatric mastocytosis in humans, which commonly begins in infancy, improves by adolescence, and is associated with somatic c-kit mutations. To our knowledge, mastocytosis has not been reported previously in a juvenile exotic felid.
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Affiliation(s)
- Rebecca C. Smedley
- Rebecca C. Smedley, Veterinary Diagnostic Laboratory, College of Veterinary Medicine, Michigan State University, 4125 Beaumont Rd, Lansing, MI 48910, USA.
| | | | - Matti Kiupel
- Veterinary Diagnostic Laboratory, College of Veterinary Medicine, Michigan State University, Lansing, MI, USA,Department of Pathobiology and Diagnostic Investigation, College of Veterinary Medicine, Michigan State University, Lansing, MI, USA
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Arz R, Seehusen F, Meier VS, Nolff MC. Indocyanine-based near-infrared lymphography for real-time detection of lymphatics in a cat with multiple mast cell tumours. JFMS Open Rep 2022; 8:20551169221074961. [PMID: 35251677 PMCID: PMC8891856 DOI: 10.1177/20551169221074961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Case summary An 11-year-old female domestic shorthair cat was presented with cutaneous mast cell tumours (MCTs) localised at the right temporal region, the left buccal region and on the third digit of the right thoracic limb. Staging was negative and locoregional lymph nodes appeared normal, based on clinical findings. During surgery, real-time indocyanine green (ICG)-based lymphography was performed to detect the cutaneous draining pattern of all the primary MCTs. ICG was injected intracutaneously in four quadrants around each tumour, and a clear lymphogram was visible shortly after injection. Using near-infrared lymphography (NIR-L) for guidance, all lymphadenectomies were performed in 12 mins or less, with a maximal incision length of 3.5 cm. The smallest resected node was 0.9 cm in diameter. All MCTs were classified as low-grade cutaneous MCT. All four ICG-positive lymph nodes were considered premetastatic or metastatic. The only ICG-negative resected node was also negative for tumour cells. No complications related to NIR-L were recorded. Relevance and novel information This is the first description of NIR-L in a cat with MCT. Application was straightforward and ICG enrichment only occurred in the metastatic nodes, suggesting correct identification of lymphatic draining patterns. Of note, as previously described in dogs, we did detect nodal metastasis, despite low-grade primary tumours. The clinical relevance should be evaluated in future studies.
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Affiliation(s)
- Raphael Arz
- Clinic for Small Animal Surgery, Department for Small Animals, Vetsuisse Faculty, University of Zurich, Switzerland
| | - Frauke Seehusen
- Institute of Veterinary Pathology, Vetsuisse Faculty, University of Zurich, Switzerland
| | - Valeria S Meier
- Clinic for Oncology and Radiation Oncology, Department for Small Animals, Vetsuisse Faculty, University of Zurich, Switzerland
- Department of Physics, University of Zurich, Switzerland
| | - Mirja C Nolff
- Clinic for Small Animal Surgery, Department for Small Animals, Vetsuisse Faculty, University of Zurich, Switzerland
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MAST CELL TUMORS IN CHEETAH ( ACINONYX JUBATUS): A CASE SERIES. J Zoo Wildl Med 2021; 51:1025-1034. [PMID: 33480586 DOI: 10.1638/2020-0006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/18/2020] [Indexed: 11/21/2022] Open
Abstract
Mast cell tumors in nondomestic felids are rarely reported and their biological characteristics are not well described. A retrospective review of the pathology records of 52 zoo-housed cheetahs (Acinonyx jubatus) identified five cases of mast cell tumor, involving four closely related individuals. The age at initial presentation varied from 14 mo to 6 yr. Four cases presented as solitary or multiple cutaneous masses that were mostly slow growing, up to 20 mm diameter, and predominantly nonulcerated. The diagnosis was made by fine needle aspiration cytology of a lesion in one case and by excisional biopsy in the others. Histopathologically, the lesions resembled low- to intermediate-grade canine mast cell tumors, with variations in the degree of anisocytosis and anisokaryosis. Surgical excision was incomplete for 80% of the cutaneous lesions, but local recurrence was not observed in any case. One animal with cutaneous lesions subsequently developed fatal visceral mastocytosis involving the spleen, liver, and adrenal gland. There was no evidence of lymph node invasion or paraneoplastic gastrointestinal signs in any of the cases.
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Avallone G, Rasotto R, Chambers JK, Miller AD, Behling-Kelly E, Monti P, Berlato D, Valenti P, Roccabianca P. Review of Histological Grading Systems in Veterinary Medicine. Vet Pathol 2021; 58:809-828. [PMID: 33769136 DOI: 10.1177/0300985821999831] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Tumor grading is a method to quantify the putative clinical aggressiveness of a neoplasm based on specific histological features. A good grading system should be simple, easy to use, reproducible, and accurately segregate tumors into those with low versus high risk. The aim of this review is to summarize the histological and, when available, cytological grading systems applied in veterinary pathology, providing information regarding their prognostic impact, reproducibility, usefulness, and shortcomings. Most of the grading schemes used in veterinary medicine are developed for common tumor entities. Grading systems exist for soft tissue sarcoma, osteosarcoma, multilobular tumor of bone, mast cell tumor, lymphoma, mammary carcinoma, pulmonary carcinoma, urothelial carcinoma, renal cell carcinoma, prostatic carcinoma, and central nervous system tumors. The prognostic relevance of many grading schemes has been demonstrated, but for some tumor types the usefulness of grading remains controversial. Furthermore, validation studies are available only for a minority of the grading systems. Contrasting data on the prognostic power of some grading systems, lack of detailed instructions in the materials and methods in some studies, and lack of data on reproducibility and validation studies are discussed for the relevant grading systems. Awareness of the limitations of grading is necessary for pathologists and oncologists to use these systems appropriately and to drive initiatives for their improvement.
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Affiliation(s)
- Giancarlo Avallone
- Department of Veterinary medical Sciences (DIMEVET), 9296University of Bologna, Ozzano dell'Emilia, Italy
| | | | - James K Chambers
- Laboratory of Veterinary Pathology, 13143The University of Tokyo, Tokyo, Japan
| | - Andrew D Miller
- Department of Biomedical Sciences, Section of Anatomic Pathology, 43317Cornell University College of Veterinary Medicine, Ithaca, NY, USA
| | - Erica Behling-Kelly
- Department of Population Medicine and Diagnostic Sciences, Section of Clinical Pathology, 43317Cornell University College of Veterinary Medicine, Ithaca, NY, USA
| | - Paola Monti
- 170851Dick White Referrals, Six Mile Bottom, Cambridgeshire, UK
| | - Davide Berlato
- 170851AniCura Animal Oncology and Imaging Center, Hünenberg, Switzerland
| | - Paola Valenti
- 534741Clinica Veterinaria Malpensa, Samarate (VA), Italy
| | - Paola Roccabianca
- Department of Veterinary Medicine (DIMEVET), 9304University of Milano, Lodi (LO), Italy
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Tamlin VS, Bottema CDK, Campbell-Ward ML, Hanshaw D, Peaston AE. KIT mutations in mast cell tumours from cheetahs (Acinonyx jubatus) and domestic cats (Felis catus). Vet Comp Oncol 2021; 19:381-392. [PMID: 33506612 DOI: 10.1111/vco.12683] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 01/18/2021] [Accepted: 01/23/2021] [Indexed: 12/23/2022]
Abstract
Mast cell tumours (MCT) have been documented in numerous species and mutations within the KIT proto-oncogene are implicated in the neoplastic biology of mast cells in humans, dogs and cats. This study determined high KIT gene nucleotide and Kit amino acid sequence homology between several species known to suffer mast cell neoplasia and especially high sequence conservation between the cheetah (Acinonyx jubatus) and domestic cat (Felis catus) KIT sequences. As a result, we hypothesised that KIT mutations would exist in the neoplastic DNA of four cheetahs diagnosed with MCT from a recent case series. PCR and Sanger sequencing identified conservative exon 6 KIT mutations in two of the four cheetahs. The mutations were different between the two cheetahs. Only wild-type DNA in exons 6, 8, 9 and 11 of KIT was observed in the MCTs of the remaining two cheetahs. Twenty cutaneous MCTs from domestic cats were collected for KIT mutation comparison. Twelve tumours possessed a mutation within KIT exons 6, 8 or 9 (60%, 95% CI 38.5%-81.5%). No mutations were detected in exon 11. There was no significant association between domestic feline MCT KIT mutation status and tumour histological grade (traditional schematic, P = .934; Sabattini 2-tier schematic, P = .762) or mitotic index (P = .750). KIT mRNA and Kit protein sequences are conserved across species but the role of KIT in feline MCT pathogenesis is not completely understood.
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Affiliation(s)
- Vanessa S Tamlin
- School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, Australia
| | - Cynthia D K Bottema
- School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, Australia
| | | | | | - Anne E Peaston
- School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, Australia
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SON NV, CHAMBERS JK, NAKATA M, MIWA Y, NAKAYAMA H, UCHIDA K. Histological and immunohistochemical features of cutaneous mast cell tumor in six captive four-toed hedgehogs ( Atelerix albiventris). J Vet Med Sci 2021; 84:208-212. [PMID: 34937843 PMCID: PMC8920718 DOI: 10.1292/jvms.21-0560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Nguyen Vu SON
- Laboratory of Veterinary Pathology, Graduate School of Agricultural and Life Sciences, The University of Tokyo
| | - James Kenn CHAMBERS
- Laboratory of Veterinary Pathology, Graduate School of Agricultural and Life Sciences, The University of Tokyo
| | | | | | | | - Kazuyuki UCHIDA
- Laboratory of Veterinary Pathology, Graduate School of Agricultural and Life Sciences, The University of Tokyo
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Oliveira MT, Campos M, Lamego L, Magalhães D, Menezes R, Oliveira R, Patanita F, Ferreira DA. Canine and Feline Cutaneous Mast Cell Tumor: A Comprehensive Review of Treatments and Outcomes. Top Companion Anim Med 2020; 41:100472. [PMID: 32891740 DOI: 10.1016/j.tcam.2020.100472] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 07/10/2020] [Accepted: 08/31/2020] [Indexed: 12/19/2022]
Abstract
Mast cell tumor (MCT) or mastocytoma is one of the most frequent malignant cutaneous tumors in the dog, and the second most frequent in the cat. Several mast cell tumor therapeutic approaches have been proposed in the past years for dogs and cats, resulting in very distinct outcomes. The current comprehensive literature review presents a critical approach to the scientific information published about the MCTs treatments and the subsequent prognosis and survival times, in dogs and in cats diagnosed with MCTs. A systematic review of the literature following the Cochrane principles and methodology was performed. The authors resorted to MEDLINE, Scopus, Google Scholar and Web of Science databases to select the 133 publications with evidence-based treatments for MCTs in companion animals. Results of the review suggest that the recommended treatment, prognosis and survival times for dogs and cats with MCTs depends at all times on the clinical staging, histological grade and location of the tumor.
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Affiliation(s)
- Maria Teresa Oliveira
- MED - Mediterranean Institute for Agriculture, Environment and Development, Instituto de Investigação e Formação Avançada, Universidade de Évora, Pólo da Mitra, Ap. 94, 7006-554 Évora, Portugal; Departamento de Medicina Veterinária, Escola de Ciências e Tecnologia, Universidade de Évora, Pólo da Mitra, Núcleo da Mitra, 7000 Évora, Portugal.
| | - Marco Campos
- Universidade de Évora, Pólo da Mitra, Núcleo da Mitra, 7000 Évora, Portugal
| | - Luís Lamego
- Universidade de Évora, Pólo da Mitra, Núcleo da Mitra, 7000 Évora, Portugal
| | - Diogo Magalhães
- Universidade de Évora, Pólo da Mitra, Núcleo da Mitra, 7000 Évora, Portugal
| | - Rui Menezes
- Universidade de Évora, Pólo da Mitra, Núcleo da Mitra, 7000 Évora, Portugal
| | - Renato Oliveira
- Universidade de Évora, Pólo da Mitra, Núcleo da Mitra, 7000 Évora, Portugal
| | - Francisco Patanita
- Universidade de Évora, Pólo da Mitra, Núcleo da Mitra, 7000 Évora, Portugal
| | - David A Ferreira
- MED - Mediterranean Institute for Agriculture, Environment and Development, Instituto de Investigação e Formação Avançada, Universidade de Évora, Pólo da Mitra, Ap. 94, 7006-554 Évora, Portugal; Departamento de Medicina Veterinária, Escola de Ciências e Tecnologia, Universidade de Évora, Pólo da Mitra, Núcleo da Mitra, 7000 Évora, Portugal
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14
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Bertram CA, Aubreville M, Gurtner C, Bartel A, Corner SM, Dettwiler M, Kershaw O, Noland EL, Schmidt A, Sledge DG, Smedley RC, Thaiwong T, Kiupel M, Maier A, Klopfleisch R. Computerized Calculation of Mitotic Count Distribution in Canine Cutaneous Mast Cell Tumor Sections: Mitotic Count Is Area Dependent. Vet Pathol 2019; 57:214-226. [PMID: 31808382 DOI: 10.1177/0300985819890686] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Mitotic count (MC) is an important element for grading canine cutaneous mast cell tumors (ccMCTs) and is determined in 10 consecutive high-power fields with the highest mitotic activity. However, there is variability in area selection between pathologists. In this study, the MC distribution and the effect of area selection on the MC were analyzed in ccMCTs. Two pathologists independently annotated all mitotic figures in whole-slide images of 28 ccMCTs (ground truth). Automated image analysis was used to examine the ground truth distribution of the MC throughout the tumor section area, which was compared with the manual MCs of 11 pathologists. Computerized analysis demonstrated high variability of the MC within different tumor areas. There were 6 MCTs with consistently low MCs (MC<7 in all tumor areas), 13 cases with mostly high MCs (MC ≥7 in ≥75% of 10 high-power field areas), and 9 borderline cases with variable MCs around 7, which is a cutoff value for ccMCT grading. There was inconsistency among pathologists in identifying the areas with the highest density of mitotic figures throughout the 3 ccMCT groups; only 51.9% of the counts were consistent with the highest 25% of the ground truth MC distribution. Regardless, there was substantial agreement between pathologists in detecting tumors with MC ≥7. Falsely low MCs below 7 mainly occurred in 4 of 9 borderline cases that had very few ground truth areas with MC ≥7. The findings of this study highlight the need to further standardize how to select the region of the tumor in which to determine the MC.
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Affiliation(s)
- Christof A Bertram
- Institute of Veterinary Pathology, Freie Universität Berlin, Berlin, Germany
| | - Marc Aubreville
- Pattern Recognition Lab, Computer Science, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Corinne Gurtner
- Institute of Veterinary Pathology, Freie Universität Berlin, Berlin, Germany.,Vetsuisse Faculty, Department of Infectious Diseases and Pathobiology, Institute of Animal Pathology, University of Bern, Bern, Switzerland
| | - Alexander Bartel
- Institute for Veterinary Epidemiology and Biostatistics, Freie Universität Berlin, Berlin, Germany
| | - Sarah M Corner
- Michigan State University Veterinary Diagnostic Laboratory, Lansing, MI, USA
| | - Martina Dettwiler
- Vetsuisse Faculty, Department of Infectious Diseases and Pathobiology, Institute of Animal Pathology, University of Bern, Bern, Switzerland
| | - Olivia Kershaw
- Institute of Veterinary Pathology, Freie Universität Berlin, Berlin, Germany
| | - Erica L Noland
- Michigan State University Veterinary Diagnostic Laboratory, Lansing, MI, USA.,Department of Pathobiology and Diagnostic Investigation, College of Veterinary Medicine, Michigan State University, East Lansing, MI, USA
| | - Anja Schmidt
- Vet Med Labor GmbH, Division of IDEXX Laboratories, Ludwigsburg, Germany
| | - Dodd G Sledge
- Michigan State University Veterinary Diagnostic Laboratory, Lansing, MI, USA
| | - Rebecca C Smedley
- Michigan State University Veterinary Diagnostic Laboratory, Lansing, MI, USA
| | - Tuddow Thaiwong
- Michigan State University Veterinary Diagnostic Laboratory, Lansing, MI, USA
| | - Matti Kiupel
- Michigan State University Veterinary Diagnostic Laboratory, Lansing, MI, USA.,Department of Pathobiology and Diagnostic Investigation, College of Veterinary Medicine, Michigan State University, East Lansing, MI, USA
| | - Andreas Maier
- Pattern Recognition Lab, Computer Science, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Robert Klopfleisch
- Institute of Veterinary Pathology, Freie Universität Berlin, Berlin, Germany
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15
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Tamlin VS, Bottema CDK, Peaston AE. Comparative aspects of mast cell neoplasia in animals and the role of KIT in prognosis and treatment. Vet Med Sci 2019; 6:3-18. [PMID: 31650704 PMCID: PMC7036313 DOI: 10.1002/vms3.201] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Mast cell neoplasia clinical presentation and biological behaviour vary considerably across mammalian species, ranging from a solitary benign mass to an aggressive systemic malignancy. Mutations in the KIT Proto‐Oncogene Receptor Tyrosine Kinase (KIT) gene are common molecular abnormalities involved in mast cell tumorigenesis. KIT mutations often occur in dog, cat and human neoplastic mast cells and result in altered Kit protein structure and function. In dogs, certain KIT mutations are associated with more malignant and lethal disease. In contrast, KIT mutations in feline and human mast cell neoplasms are not correlated with prognosis, but are of value in diagnosis and treatment planning in humans. KIT genetic abnormalities have not been well investigated in other species, although aberrant cytoplasmic Kit protein staining detected in neoplasms of the ferret, horse and cow resembles aberrant Kit staining patterns detected in neoplastic mast cells of dogs, cats and humans. Mutations within KIT are classified as either regulatory‐type or enzymatic pocket‐type mutations according to their location within the KIT Proto‐Oncogene. Mutations within the enzymatic pocket domain confer tumour resistance to tyrosine kinase inhibitors (TKIs). Hence, knowledge of tumour KIT mutation status adds valuable information for optimizing patient treatment strategies. The use of TKIs in combination with conventional chemotherapeutics has opened a new treatment avenue for patients unresponsive to existing drugs. This review highlights the similarities and differences of mast cell neoplasia in mammals with a special focus on the involvement of KIT in the canine and feline forms in comparison to human mast cell neoplasia.
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Affiliation(s)
- Vanessa S Tamlin
- School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, SA, Australia
| | - Cynthia D K Bottema
- School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, SA, Australia
| | - Anne E Peaston
- School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, SA, Australia
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