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Espinosa J, Ortega M, Pumarola M, Fraga E, Martín L. Metastatic Multifocal Malignant Peripheral Nerve Sheath Tumour in the Cervicothoracic Spinal Cord of a Dog Initially Mimicking Meningomyelitis. Vet Sci 2023; 10:vetsci10020170. [PMID: 36851474 PMCID: PMC9965354 DOI: 10.3390/vetsci10020170] [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: 01/06/2023] [Revised: 02/16/2023] [Accepted: 02/16/2023] [Indexed: 02/23/2023] Open
Abstract
A nine year old cross-breed dog was presented with a two week history of ambulatory tetraparesis and proprioceptive ataxia affecting all four limbs. Meningomyelitis of Unknown Origin (MUO) was presumptively diagnosed based on the magnetic resonance imaging (MRI) findings and cerebrospinal fluid (CSF) analysis. The dog received a tapering dose of glucocorticoids and cyclosporine, showing significant improvement and the stabilization of the clinical signs for seven months. After this period, the dog showed an acute clinical deterioration and a follow-up MRI revealed new multiple lesions affecting different spinal nerve roots along the cervicothoracic spinal cord. Following euthanasia, a final diagnose of multiple malignant peripheral nerve sheath tumors (MPNSTs) was made based on the histopathological examination. MPNSTs can affect the cranial nerves, spinal nerves or the associated nerve roots at any location and can lead to secondary spinal cord compression. The aim of the present case report is to describe the clinical presentation and atypical MRI findings of a dog with histologically confirmed multiple MPNSTs. According to the reviewed literature, this is the first reported case of simultaneous MPNSTs in the cervicothoracic spinal cord of a dog.
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Affiliation(s)
- Javier Espinosa
- Neurology and Neurosurgery Service of Centro Clínico Veterinario Indautxu, Alameda de San Mamés 38, 48010 Bilbao, Spain
- Neurology and Neurosurgery Service, Pride Referrals, Derby DE248 HX, UK
| | - María Ortega
- Neurology and Neurosurgery Service of Centro Clínico Veterinario Indautxu, Alameda de San Mamés 38, 48010 Bilbao, Spain
| | - Martí Pumarola
- Mouse and Comparative Pathology Unit, Department of Animal Medicine and Surgery, Veterinary Faculty, Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Campus UAB, Universitat Autònoma de Barcelona, Bellaterra, 08193 Barcelona, Spain
| | - Eduardo Fraga
- Fraga Diagnostic España, S.L., Mijas Costa, 29649 Malaga, Spain
| | - Laura Martín
- Neurology and Neurosurgery Service of Centro Clínico Veterinario Indautxu, Alameda de San Mamés 38, 48010 Bilbao, Spain
- Correspondence:
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Aluai-Cunha C, Matos A, Amorim I, Carvalho F, Rêma A, Santos A. Immunohistochemical Expression of Platelet-Derived Growth Factor Receptor β (PDGFR-β) in Canine Cutaneous Peripheral Nerve Sheath Tumors: A Preliminary Study. Vet Sci 2022; 9:vetsci9070345. [PMID: 35878362 PMCID: PMC9319676 DOI: 10.3390/vetsci9070345] [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: 05/31/2022] [Revised: 06/30/2022] [Accepted: 07/07/2022] [Indexed: 11/29/2022] Open
Abstract
Simple Summary The peripheral nerve sheath tumors are relatively common neoplasms, belong to the soft tissue sarcomas group, and are poorly investigated in veterinary medicine; the diagnosis is complex, and therapeutic options are limited. The platelet-derived growth factor receptors, namely the β subunit, are an important class of tyrosine kinase receptors that can be activated by genetic alterations and contribute to the process of carcinogenesis, so the inhibition of this receptor is an important therapeutic target. Using the immunohistochemical technique, this study aims to evaluate the expression of this receptor in 19 samples, 10 malignant and 9 benign tumors. The results showed that the majority of benign tumors, about 67% of cases, expressed the receptor in less than 25% of neoplastic cells and, in 80% cases of malignant tumors, the receptor was expressed in more than 25% of neoplastic cells. It was also found that, in the larger tumors, the expression of this receptor was significantly higher. With these findings it seems reasonable to speculate that the drugs able to inhibit this receptor, such as toceranib, may be considered in the therapeutic approach of these tumors. Abstract As in humans, the prevalence of tumors in companion animals is increasing dramatically and there is a strong need for research on new pharmacological agents particularly for the treatment of those tumors that are resistant to conventional chemotherapy agents such as soft tissue sarcomas (STS). Because malignant (MPNST) and benign peripheral nerve sheath tumors (BPNST) are relatively common STS in dogs, the aim of this retrospective study was to evaluate the immunohistochemical (IHC) expression of PDGFR-β, contributing to its characterization as a potential target for their treatment. A total of 19 samples were included, 9 histologically classified as benign and the other 10 as malignant. The results showed diffuse immunoexpression in the cytoplasm of neoplastic cells. Six (66.7%) BPNST expressed the receptor in less than 25% of neoplastic cells and only three (33.3%) exhibited labelling in more than 25% of neoplastic cells. In contrast, all MPNST expressed PDGFR-β, and in 8 (80%) of these samples, the receptor was expressed in more than 25% of neoplastic cells, and only 2 (20%) cases expressed the receptor in less than 25% of neoplastic cells. PDGFR-β expression was significantly higher in MPNST and larger tumors, suggesting that drugs able to inhibit the activity of this tyrosine kinase receptor, such as toceranib, may be considered in the approach of unresectable tumors and/or in the context of adjuvant or neoadjuvant therapies.
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Affiliation(s)
- Catarina Aluai-Cunha
- Department of Veterinary Clinics, Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, R. Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal; (C.A.-C.); (A.M.)
| | - Augusto Matos
- Department of Veterinary Clinics, Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, R. Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal; (C.A.-C.); (A.M.)
- Animal Science and Study Centre (CECA), Food and Agrarian Sciences and Technologies Institute (ICETA), P. Gomes Teixeira, Apartado 55142, 4051-401 Porto, Portugal
| | - Irina Amorim
- Department of Pathology and Molecular Immunology, Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, R. Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal; (I.A.); (F.C.); (A.R.)
- Institute of Molecular Pathology and Immunology (IPATIMUP), University of Porto, R. Júlio Amaral de Carvalho 45, 4200-135 Porto, Portugal
- Institute for Research and Innovation in Health (I3S), University of Porto, R. Alfredo Allen 208, 4200-135 Porto, Portugal
| | - Fátima Carvalho
- Department of Pathology and Molecular Immunology, Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, R. Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal; (I.A.); (F.C.); (A.R.)
| | - Alexandra Rêma
- Department of Pathology and Molecular Immunology, Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, R. Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal; (I.A.); (F.C.); (A.R.)
| | - Andreia Santos
- Department of Veterinary Clinics, Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, R. Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal; (C.A.-C.); (A.M.)
- Animal Science and Study Centre (CECA), Food and Agrarian Sciences and Technologies Institute (ICETA), P. Gomes Teixeira, Apartado 55142, 4051-401 Porto, Portugal
- Correspondence:
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Tekavec K, Švara T, Knific T, Gombač M, Cantile C. Histopathological and Immunohistochemical Evaluation of Canine Nerve Sheath Tumors and Proposal for an Updated Classification. Vet Sci 2022; 9:vetsci9050204. [PMID: 35622732 PMCID: PMC9144584 DOI: 10.3390/vetsci9050204] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 03/31/2022] [Accepted: 04/04/2022] [Indexed: 02/01/2023] Open
Abstract
Nerve sheath tumors are a group of tumors originating from Schwann cells, fibroblasts, and perineurial cells. In veterinary pathology, the terminology for nerve sheath tumors remains inconsistent, and many pathologists follow the human classification of such tumors in practice. Immunohistochemistry plays an important role in the diagnosis of nerve sheath tumors, but specific immunohistochemical and molecular biomarkers are lacking. In our study, we histopathologically reevaluated 79 canine nerve sheath tumors and assessed their reactivity for the immunohistochemical markers Sox10, claudin-1, GFAP, CNPase, and Ki-67. Based on the results, we classified the tumors according to the most recent human classification. Twelve cases were diagnosed as benign nerve sheath tumors, including six neurofibromas, three nerve sheath myxomas, two hybrid nerve sheath tumors (perineurioma/neurofibroma and perineurioma/schwannoma), and one schwannoma. Sixty-seven tumors were malignant nerve sheath tumors, including fifty-six conventional, four perineural, one epithelioid malignant nerve sheath tumor, and six malignant nerve sheath tumors with divergent differentiation. We believe that with the application of the proposed panel, an updated classification of canine nerve sheath tumors could largely follow the recent human WHO classification of tumors of the cranial and paraspinal nerves, but prospective studies would be needed to assess its prognostic value.
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Affiliation(s)
- Kristina Tekavec
- Department of Veterinary Science, University of Pisa, 56124 Pisa, Italy;
- Institute of Pathology, Wild Animals, Fish and Bees, Veterinary Faculty, University of Ljubljana, 1000 Ljubljana, Slovenia; (T.Š.); (M.G.)
- Correspondence:
| | - Tanja Švara
- Institute of Pathology, Wild Animals, Fish and Bees, Veterinary Faculty, University of Ljubljana, 1000 Ljubljana, Slovenia; (T.Š.); (M.G.)
| | - Tanja Knific
- Institute of Food Safety, Feed and Environment, Veterinary Faculty, University of Ljubljana, 1000 Ljubljana, Slovenia;
| | - Mitja Gombač
- Institute of Pathology, Wild Animals, Fish and Bees, Veterinary Faculty, University of Ljubljana, 1000 Ljubljana, Slovenia; (T.Š.); (M.G.)
| | - Carlo Cantile
- Department of Veterinary Science, University of Pisa, 56124 Pisa, Italy;
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Osum SH, Watson AL, Largaespada DA. Spontaneous and Engineered Large Animal Models of Neurofibromatosis Type 1. Int J Mol Sci 2021; 22:1954. [PMID: 33669386 PMCID: PMC7920315 DOI: 10.3390/ijms22041954] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 02/02/2021] [Accepted: 02/04/2021] [Indexed: 12/13/2022] Open
Abstract
Animal models are crucial to understanding human disease biology and developing new therapies. By far the most common animal used to investigate prevailing questions about human disease is the mouse. Mouse models are powerful tools for research as their small size, limited lifespan, and defined genetic background allow researchers to easily manipulate their genome and maintain large numbers of animals in general laboratory spaces. However, it is precisely these attributes that make them so different from humans and explains, in part, why these models do not accurately predict drug responses in human patients. This is particularly true of the neurofibromatoses (NFs), a group of genetic diseases that predispose individuals to tumors of the nervous system, the most common of which is Neurofibromatosis type 1 (NF1). Despite years of research, there are still many unanswered questions and few effective treatments for NF1. Genetically engineered mice have drastically improved our understanding of many aspects of NF1, but they do not exemplify the overall complexity of the disease and some findings do not translate well to humans due to differences in body size and physiology. Moreover, NF1 mouse models are heavily reliant on the Cre-Lox system, which does not accurately reflect the molecular mechanism of spontaneous loss of heterozygosity that accompanies human tumor development. Spontaneous and genetically engineered large animal models may provide a valuable supplement to rodent studies for NF1. Naturally occurring comparative models of disease are an attractive prospect because they occur on heterogeneous genetic backgrounds and are due to spontaneous rather than engineered mutations. The use of animals with naturally occurring disease has been effective for studying osteosarcoma, lymphoma, and diabetes. Spontaneous NF-like symptoms including neurofibromas and malignant peripheral nerve sheath tumors (MPNST) have been documented in several large animal species and share biological and clinical similarities with human NF1. These animals could provide additional insight into the complex biology of NF1 and potentially provide a platform for pre-clinical trials. Additionally, genetically engineered porcine models of NF1 have recently been developed and display a variety of clinical features similar to those seen in NF1 patients. Their large size and relatively long lifespan allow for longitudinal imaging studies and evaluation of innovative surgical techniques using human equipment. Greater genetic, anatomic, and physiologic similarities to humans enable the engineering of precise disease alleles found in human patients and make them ideal for preclinical pharmacokinetic and pharmacodynamic studies of small molecule, cellular, and gene therapies prior to clinical trials in patients. Comparative genomic studies between humans and animals with naturally occurring disease, as well as preclinical studies in large animal disease models, may help identify new targets for therapeutic intervention and expedite the translation of new therapies. In this review, we discuss new genetically engineered large animal models of NF1 and cases of spontaneous NF-like manifestations in large animals, with a special emphasis on how these comparative models could act as a crucial translational intermediary between specialized murine models and NF1 patients.
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Affiliation(s)
- Sara H. Osum
- Masonic Cancer Center, Department of Pediatrics, Division of Hematology and Oncology, University of Minnesota, Minneapolis, MN 55455, USA;
| | | | - David A. Largaespada
- Masonic Cancer Center, Department of Pediatrics, Division of Hematology and Oncology, University of Minnesota, Minneapolis, MN 55455, USA;
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Ranjan A, Kishore D, Ashar H, Neel T, Singh A, More S. Focused ultrasound ablation of a large canine oral tumor achieves efficient tumor remission: a case report. Int J Hyperthermia 2021; 38:552-560. [PMID: 33784931 PMCID: PMC8189657 DOI: 10.1080/02656736.2021.1903582] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 02/17/2021] [Accepted: 03/10/2021] [Indexed: 01/16/2023] Open
Abstract
Purpose: Oral cancers are one of the commonly diagnosed tumors worldwide in human and veterinary patients. Most oral cancers are surgically resected; however, obtaining an adequate margin of safety in patients without compromising their quality of life is often challenging. Herein, we investigated the ability of non-invasive focused ultrasound (FUS) to thermally ablate a biopsy confirmed canine oral cancer. Materials and Methods: A male canine patient with a large neurilemmoma (schwannoma) mass on the left maxilla, with evidence of thinning and loss of alveolar bone and pressure necrosis, was treated with FUS ablation instead of the traditional maxillectomy procedure. FUS ablations were performed in three sessions over three weeks. Tumor remission was determined with computed tomography and histopathological examination of the treated site. Additionally, the anti-tumor immune effects of FUS were assessed by flow cytometry analysis of blood and tumor samples. Results: Complete tumor remission was noted at the treated site. Treatment related adverse events were primarily thermal burns of the buccal mucosa, which were managed with periodic hyperbaric oxygen therapy and surgical coverage of the underlying exposed bones with gingival flaps. Enhanced proliferation of adaptive immunity cells (e.g., T-cells) was observed in tumor and blood samples. Conclusion: Our limited investigation in a canine oral cancer patient suggests that FUS may avoid the need for large-scale resection of bony tissues, thus potentially improving quality of life.
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Affiliation(s)
- Ashish Ranjan
- Department of Physiological Sciences, College of Veterinary Medicine, Oklahoma State University, Stillwater, OK 74078
| | | | - Harshini Ashar
- Department of Physiological Sciences, College of Veterinary Medicine, Oklahoma State University, Stillwater, OK 74078
| | - Tina Neel
- Neel Veterinary Hospital, Oklahoma City, OK, 73127
| | - Akansha Singh
- Department of Physiological Sciences, College of Veterinary Medicine, Oklahoma State University, Stillwater, OK 74078
| | - Sunil More
- Department of Veterinary Pathobiology, College of Veterinary Medicine, Oklahoma State University, Stillwater, OK 74078
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Malignant Peripheral Nerve Sheath Tumour in the Urinary Bladder of a Dog. J Comp Pathol 2020; 175:64-68. [PMID: 32138844 DOI: 10.1016/j.jcpa.2019.12.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 12/20/2019] [Accepted: 12/23/2019] [Indexed: 02/06/2023]
Abstract
A 15-year-old neutered male miniature pinscher was presented with a pedunculated mass (4 × 1 cm) in its urinary bladder. Exploratory cystotomy revealed that the mass was located at the trigone of the bladder and projected into the lumen. The cut surface of the mass was homogeneous grey to tan in colour with focal brown pigmentation. Microscopically, the mass was predominantly composed of neoplastic spindle cells characterized by moderate cellular pleomorphism, invasion into the muscular layer of the bladder wall and few mitotic figures. The neoplastic spindle cells formed interwoven bundles intersecting at various angles. Immunohistochemically, these cells were negative for cytokeratin 7 and α-smooth muscle actin, but strongly expressed S100 and vimentin, confirming a diagnosis of a malignant peripheral nerve sheath tumour (PNST). To the best of our knowledge, this is the first report of a primary malignant PNST in the urinary bladder of a dog.
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Immunohistochemical Distinguishing between Canine Peripheral Nerve Sheath Tumors and Perivascular Wall Tumors. ACTA VET-BEOGRAD 2019. [DOI: 10.2478/acve-2019-0024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Abstract
Peripheral nerve sheath tumors (PNSTs) comprise a heterogeneous group of neoplasms originating from the elements of the nerve sheath. They are divided into two forms: benign and malignant PNST. Both benign and malignant PNSTs are not very common in domestic animals but they are reported in different animal species. Histologically, PNSTs are composed predominantly of spindle cells arranged in bundles, whorls and sheets, with a different number of pleomorphic cells and mitotic figures.
The aim of this study was a reclassification of 17 dog tumor samples initially diagnosed with peripheral nerve sheath tumors using histopathological analysis. The main criterion for reclassification was immunohistochemical positivity for various antigens.
PNSTs are often histologically very similar to other spindle cell tumors and immunohistochemistry is required for differential diagnosis. PNSTs generally express vimentin, S-100 protein, glial fibrillary acidic protein (GFAP), collagen IV and laminin.
Four tumor samples were positive to muscular marker α-SMA and vimentin and negative for S-100 protein and desmin. The spindle cells whirling around some blood vessels were observed in these tumors so they were reclassified as perivascular wall tumors (PWTs). The other 13 tumors were S-100 protein and vimentin positive and α-SMA and desmin negative, thus classified as PNST.
The use of the immunohistochemical panel is necessary for distinguishing PNSTs from PWTs in routine diagnostics.
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Boland L, Setyo L, Sangster C, Brunel L, Foo T, Bennett P. Colonic malignant peripheral nerve sheath tumour in a cat. JFMS Open Rep 2019; 5:2055116919849979. [PMID: 31236282 PMCID: PMC6572897 DOI: 10.1177/2055116919849979] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Case summary A 14-year-old male neutered domestic mediumhair cat presented with a 4 month
history of inappetence and weight loss. Pertinent abnormalities on
haematology and biochemistry included a mild microcytic regenerative anaemia
(packed cell volume [PCV] 24% [reference interval (RI) 30–45%], mean cell
volume 30.8 fl [RI 40–45 fl], absolute reticulocyte count 326.8 ×
1012) and increased alkaline phosphatase activity (76 IU/l;
RI <50 IU/l). Abdominal ultrasound and CT scan revealed masses in the
transverse colon (2.0 cm × 1.2 cm) and right medial liver lobe (5.0 cm
diameter). Thoracic radiographs were unremarkable. Right medial liver lobe
resection and colectomy were performed. Immunohistochemistry was positive
for S-100 protein, vimentin and glial fibrillary acidic protein, very weakly
positive for c-kit and negative for muscle-specific actin and CD18,
consistent with a colonic malignant peripheral nerve sheath tumour (MPNST)
with a hepatic metastasis. Postoperative treatment with metronomic
cyclophosphamide was well tolerated. Eighteen months postoperatively the cat
re-presented after 3 days of progressive lethargy and inappetence.
Haematology revealed a marked non- or pre-regenerative anaemia (PCV 10%).
Coagulation times were prolonged (prothrombin time 39 s [RI 15–22 s] and
activated partial thromboplastin time >300 s [RI 65–119 s]). Abdominal
ultrasound identified multiple renal and hepatic nodules. Euthanasia was
performed and post-mortem examination confirmed metastasis of the MPNST. Relevance and novel information This report describes the treatment of a metastatic colonic peripheral nerve
sheath tumour in a cat. Feline visceral MPNSTs are rare and little is known
about prognosis or optimal treatment.
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Affiliation(s)
- Lara Boland
- Valentine Charlton Cat Centre, Sydney School of Veterinary Science, Faculty of Science, University of Sydney, NSW, Australia
| | - Laura Setyo
- Veterinary Pathology Diagnostic Services, Sydney School of Veterinary Science, Faculty of Science, University of Sydney, NSW, Australia
| | - Cheryl Sangster
- Veterinary Pathology Diagnostic Services, Sydney School of Veterinary Science, Faculty of Science, University of Sydney, NSW, Australia
| | - Laurencie Brunel
- Valentine Charlton Cat Centre, Sydney School of Veterinary Science, Faculty of Science, University of Sydney, NSW, Australia
| | - Timothy Foo
- Valentine Charlton Cat Centre, Sydney School of Veterinary Science, Faculty of Science, University of Sydney, NSW, Australia
| | - Peter Bennett
- Valentine Charlton Cat Centre, Sydney School of Veterinary Science, Faculty of Science, University of Sydney, NSW, Australia
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