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Landy S, Peralta S, Fiani N. An Atypical Presentation of a Zygomatic Sialocele in a dog. J Vet Dent 2022; 38:223-230. [PMID: 35037496 DOI: 10.1177/08987564211072675] [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: 11/16/2022]
Abstract
A sialocele is an accumulation of salivary fluid due to leakage into the interstitial space surrounding the affected salivary gland and/or its corresponding duct. Reported causes of salivary leakage include trauma, foreign bodies, sialoliths, and neoplasia, but in many cases the etiology is not identified. Clinical signs of sialoceles associated with the zygomatic salivary gland or corresponding duct usually include exophthalmos due to periorbital salivary accumulation, whereas sialoceles associated with the mandibular or sublingual glands or ducts usually manifest as cervical, pharyngeal and/or sublingual salivary accumulation. This case report describes an atypical cervical presentation of a zygomatic sialocele in a dog that resolved after zygomatic sialoadenectomy.
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Affiliation(s)
- Shanna Landy
- University College of Veterinary Medicine, 930 Campus Road, C2-513, Ithaca, NY 14853-6401
| | - Santiago Peralta
- 43317Cornell University College of Veterinary Medicine, C3-510 CPC, Box 31, College of Veterinary Medicine, Ithaca, NY 14853
| | - Nadine Fiani
- 43317Cornell University College of Veterinary Medicine, 930 Campus rd., Ithaca, NY 14853-0001
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Takai Y, Sano T, Watanabe T. A case of hepatic leiomyosarcoma with osteosarcomatous differentiation (malignant mesenchymoma) in a dog. J Toxicol Pathol 2020; 33:33-37. [PMID: 32051664 PMCID: PMC7008204 DOI: 10.1293/tox.2019-0065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 10/18/2019] [Indexed: 01/07/2023] Open
Abstract
A rare spontaneous hepatic leiomyosarcoma with osteosarcomatous differentiation was
observed in a female beagle dog and its morphological and immunohistochemical
characteristics were examined. Upon necropsy, an endoceliac mass originating from the
liver was detected, which was composed of hematoid fluid-filled cysts and white to grayish
solid tissue. There were no macroscopic findings in other organ systems.
Histopathologically, the hepatic mass consisted of two different mesenchymal components.
One form was spindle cells arranged in interlacing fascicles immunohistochemically
positive for smooth muscle actin (SMA) and smoothelin, indicating leiomyosarcomatous
differentiation. The other form was composed of short spindle cells positive for S-100 and
was producing various amounts of eosinophilic osteoid and trabecula-like matrices positive
for osteocalcin, indicating osteosarcomatous differentiation. In addition, invasive growth
in the hepatic parenchyma and cell atypia were observed. Based on these findings, the mass
was diagnosed as hepatic leiomyosarcoma with osteosarcomatous differentiation (malignant
mesenchymoma), which might be derived from undifferentiated mesenchymal cells.
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Affiliation(s)
- Yuichi Takai
- Drug Safety Research and Evaluation, Takeda Pharmaceutical Company Limited, 26-1 Muraoka-Higashi 2 Chome, Fujisawa, Kanagawa 251-8555, Japan
| | - Tomoya Sano
- Drug Safety Research and Evaluation, Takeda Pharmaceutical Company Limited, 26-1 Muraoka-Higashi 2 Chome, Fujisawa, Kanagawa 251-8555, Japan
| | - Takeshi Watanabe
- Drug Safety Research and Evaluation, Takeda Pharmaceutical Company Limited, 26-1 Muraoka-Higashi 2 Chome, Fujisawa, Kanagawa 251-8555, Japan
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Parslow A, Taylor DP, Simpson DJ. Clinical, computed tomographic, magnetic resonance imaging, and histologic findings associated with myxomatous neoplasia of the temporomandibular joint in two dogs. J Am Vet Med Assoc 2017; 249:1301-1307. [PMID: 27875090 DOI: 10.2460/javma.249.11.1301] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
CASE DESCRIPTION A 15-year-old neutered female mixed-breed dog (dog 1) and an 11-year-old neutered female Labrador Retriever (dog 2) were examined because of unilateral exophthalmus, third eyelid protrusion, and periorbital swelling that failed to respond to antimicrobial treatment. CLINICAL FINDINGS Both dogs underwent ultrasonographic, CT, and MRI examination of the head. In both dogs, advanced imaging revealed a poorly defined, peripherally contrast-enhancing, mucous-filled cystic mass that radiated from the temporomandibular joint and infiltrated the periorbital tissues and retrobulbar space. Both dogs underwent surgical biopsy of the periorbital mass. A viscous, straw-colored fluid was aspirated from the retrobulbar region in both dogs. The initial histologic diagnosis for dog 1 was zygomatic sialadenitis and sialocele. However, the clinical signs recurred, and histologic examination of specimens obtained during a second surgical biopsy resulted in a diagnosis of myxoma. The histologic diagnosis was myxosarcoma for dog 2. TREATMENT AND OUTCOME In both dogs, clinical signs recurred within 2 weeks after surgery and persisted for the duration of their lives. Dog 1 received no further treatment after the second surgery and was euthanized 34 months after initial examination because of multicentric lymphoma. Dog 2 was treated with various chemotherapy agents and was euthanized 11 months after initial examination because of a dramatic increase in periocular swelling and respiratory stertor. CLINICAL RELEVANCE Temporomandibular myxomatous neoplasia can be confused with zygomatic sialocele on the basis of clinical signs but has characteristic MRI features. Representative biopsy specimens should be obtained from areas close to the temporomandibular joint to avoid misdiagnosis.
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Weishaar KM, Edmondson EF, Thamm DH, Olver CS. Malignant mesenchymoma with widespread metastasis including bone marrow involvement in a dog. Vet Clin Pathol 2014; 43:447-52. [DOI: 10.1111/vcp.12180] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Elijah F. Edmondson
- Microbiology, Immunology, and Pathology Department; Colorado State University; Fort Collins CO USA
| | - Douglas H. Thamm
- Flint Animal Cancer Center; Colorado State University; Fort Collins CO USA
| | - Christine S. Olver
- Microbiology, Immunology, and Pathology Department; Colorado State University; Fort Collins CO USA
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Diagnosis and treatment considerations in a case of malignant mesenchymoma in an African fur seal (Arctocephalus pusillus). J Zoo Wildl Med 2013; 44:466-9. [PMID: 23805568 DOI: 10.1638/2012-0004r2.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A 20-yr-old African fur seal (Arctocephalus pusillus) presented with a slowly growing mass located on the dorsum at the level of the last thoracic vertebrae. The mass was hard, 10 cm in diameter, and not adherent to the underlying tissues. Multiple biopsies were collected for histopathology and revealed extensive areas of necrosis, small nodules of malignant mesenchymal proliferation with areas of chondroid metaplasia, and atypical cells in vessel walls. The morphologic diagnosis was suggestive of malignant mesenchymal neoplasia originating from the vascular wall. The mass was removed 1 mo later due to ulceration and infection. Histologically, based on the World Health Organization's classification of neoplastic processes in domestic animals, the tumor was consistent with malignant mesenchymoma. The margins of resection revealed the presence of neoplastic cells. Based on these results, the particular species involved, the high local invasiveness, and the high metastatic index of this malignant tumor in domestic mammals and humans, the prognosis was poor. The animal died 6 mo later with metatastic disease.
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Gómez-Laguna J, Barranco I, Rodríguez-Gómez IM, Blanco B, Guil-Luna S, Carrasco L, de las Mulas JM. Malignant mesenchymoma of the heart base in a dog with infiltration of the pericardium and metastasis to the lung. J Comp Pathol 2012; 147:195-8. [PMID: 22516086 DOI: 10.1016/j.jcpa.2012.01.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2011] [Revised: 12/11/2011] [Accepted: 01/04/2012] [Indexed: 11/25/2022]
Abstract
A 9-year-old male rottweiler was presented with abdominal distension, ascites and respiratory distress and marked bulging in the perineal region. At necropsy examination the animal had profuse ascites and hydropericardium and a multinodular mass in the right auricle of the heart infiltrating the epicardium and pericardium and metastasizing to the caudal lobe of the left lung. Microscopically and immunohistochemically the tumour was composed of neoplastic cells with muscular, cartilaginous and adipose differentiation. A diagnosis of malignant mesenchymoma with leiomyosarcomatous (≈ 50%), rhabdomyosarcomatous (≈ 30%), chondrosarcomatous (25%) and liposarcomatous (5%) components was made. Metastatic malignant mesenchymoma has not been reported previously at this site in the dog.
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Affiliation(s)
- J Gómez-Laguna
- Department of Anatomy and Comparative Pathology, Campus of Rabanales, Faculty of Veterinary Medicine, Córdoba University, International Excellence Agrifood Campus - CeiA3, Spain.
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Headley SA, Faria Dos Reis AC, Bracarense APFRL. Cutaneous myxosarcoma with pulmonary metastases in a dog. J Comp Pathol 2011; 145:31-4. [PMID: 21310431 DOI: 10.1016/j.jcpa.2010.12.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2010] [Revised: 09/21/2010] [Accepted: 12/01/2010] [Indexed: 10/18/2022]
Abstract
The pathological findings in a 13-year-old dog with cutaneous myxosarcoma with pulmonary metastases are described. Grossly, there was a large subcutaneous mass in the right scapular region, a smaller nodule in the caudal abdominal region and a fibrotic mass at a fracture site in the right hindlimb. Radiographic examination revealed several pulmonary nodules. Microscopical evaluation revealed a myxosarcoma characterized by the proliferation of spindle to stellate cells with multiple prominent nucleoli and vascular invasion. The neoplastic cells were haphazardly arranged in a mucopolysaccharide matrix. Immunohistochemically, the neoplastic cells expressed vimentin, but not cytokeratin or glial fibrillary acidic protein. There was restricted expression of desmin, smooth muscle actin and S-100 protein.
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Affiliation(s)
- S A Headley
- Section of Veterinary Pathology, Department of Basic Veterinary Sciences University of Helsinki, Finland.
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Puff C, Kehler W, Baumgärtner W, Herden C. Malignant mesenchymoma in the nasal cavity of a bull. J Comp Pathol 2011; 145:148-51. [PMID: 21306728 DOI: 10.1016/j.jcpa.2010.12.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2010] [Revised: 09/28/2010] [Accepted: 12/03/2010] [Indexed: 11/20/2022]
Abstract
A 4-year-old bull was presented with facial distortion and abnormal respiratory noise. Endoscopically, a proliferative mass was found obliterating the left nasal cavity and a tumour was suspected. The head was examined after slaughter and there was a well-circumscribed solid structure (15×12×6 cm) extending into the paranasal sinus, the choanal region and the bones of the orbit, with focal penetration of the nasal septum. Microscopically, the mass consisted of well-differentiated trabeculae of woven and lamellar bone, areas of chondromyxomatous, immature and mature cartilaginous tissue, and regions with irregular whorled spindle cells. Tissue differentiation of the mass was variable. Centrally, there was osseous differentiation with an outermost fibromatous area resembling a zone of endochondral ossification. There was suppurative and ulcerative inflammation where the tumour extended through the hard palate and into the pharynx. A nasal malignant mesenchymoma was diagnosed on the basis of these features.
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Affiliation(s)
- C Puff
- Department of Pathology, University of Veterinary Medicine, Bünteweg 17, Hannover, Germany.
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Petterino C, Bedin M, Vascellari M, Mutinelli F, Ratto A. An intra-abdominal malignant mesenchymoma associated with nonabsorbable sutures in a ferret (Mustela putorius furo). J Vet Diagn Invest 2010; 22:327-31. [PMID: 20224105 DOI: 10.1177/104063871002200233] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A 6-year-old ferret (Mustela putorius furo) was presented with abdominal enlargement. Clinical examination revealed an intra-abdominal mass measuring approximately 5 cm in diameter. Abdominal survey radiographs revealed a sharply marginated mass with multifocal radiodense foci, suggestive of pathologic calcification. A complete blood cell count revealed a moderate, normocytic, normochromic, nonregenerative anemia. The mass was surgically removed en bloc, fixed in 10% neutral buffered formalin solution, and routinely processed for histologic and immunohistochemical investigation. The neoplastic tissue consisted of a mixed neoplastic cell population, including osteosarcoma and fibrosarcoma components. Immunohistochemistry revealed that both neoplastic cell populations were positive for vimentin and negative for actin (smooth and striated), desmin, and myoglobin. Nonabsorbable suture material was admixed with the neoplastic tissue in the histologic section. This material was birefringent when viewed microscopically under polarized light.
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Affiliation(s)
- Claudio Petterino
- Department of Public Health, Comparative Pathology and Veterinary Hygiene School of Veterinary Medicine, University of Padua, Viale dell'Università 16, 35020, Legnaro (PD), Italy.
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