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Park KH, Kim TU, Park HW, Lee SW, Baek SM, Noh D, Yim JH, Lee YJ, Kim YG, Son DJ, Park SJ, Choi SK, Lee K, Park LC, Park JK. Extramedullary plasmacytoma of the oral cavity metastasising to both kidneys in a dog. Vet Med Sci 2023; 9:1053-1061. [PMID: 36748292 DOI: 10.1002/vms3.1086] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Most extramedullary plasmacytomas (EMPs) aresolitary and located in the head and neck region. They may also occur in the visceral parts of the body. OBJECTIVES Here, we report a case of oral EMP followed by neoplastic plasma cell metastasis to both kidneys in a neutered male Pomeranian. METHODS Oral plasmacytoma recurred 11 months aftersurgical removal of an oral mass and partial maxillectomy was performed. Eighteen months after partial maxillectomy, neoplastic masses were detected in both kidneys on computed tomography. The dog died 12 months after detection of bilateral kidney neoplasms. The resected neoplastic masses were routinely processed for histopathological observation and immunohistochemistry against pan-cytokeratin, desmin, CD3, and MUM-1. RESULTS The recurred mass mainly consisted of well-differentiated plasma cells and contained a small portion of aggressive cells with malignant features. Monoclonal gammopathy was not observed on serumelectrophoresis performed to exclude multiple myeloma. The mass was composed of plasma cells with high nuclear pleomorphism and abundant mitotic figures. The neoplasm stained positive for MUM-1 with a more aggressive morphology than in oral EMP. CONCLUSION Based on serum biomarker and pathological observations, a diagnosis of recurrence and metastasis of oral-to-renal EMP was established. To the best of our knowledge, metastasis of oral EMP into the bilateral kidneys, as described in the current case, has not been previously reported in dogs.
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Affiliation(s)
- Kyung Ho Park
- Department of Veterinary Pathology, College of Veterinary Medicine, Kyungpook National University, Daegu, Republic of Korea.,Naason Science, Inc., Cheongju, Republic of Korea
| | - Tae-Un Kim
- Department of Veterinary Pathology, College of Veterinary Medicine, Kyungpook National University, Daegu, Republic of Korea
| | | | - Seoung-Woo Lee
- Department of Veterinary Pathology, College of Veterinary Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Su-Min Baek
- Department of Veterinary Pathology, College of Veterinary Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Daji Noh
- 24 Africa Animal Medical Center, Daejeon, Republic of Korea
| | - Jae-Hyuk Yim
- Department of Veterinary Pathology, College of Veterinary Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Young-Jin Lee
- Department of Veterinary Pathology, College of Veterinary Medicine, Kyungpook National University, Daegu, Republic of Korea
| | | | - Dong-Ju Son
- Department of Veterinary Internal Medicine, College of Veterinary Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Sang-Joon Park
- Laboratory of Veterinary Histology, College of Veterinary Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Seong-Kyoon Choi
- Core Protein Resources Center (CPRC), Division of Biotechnology, DGIST, Daegu, Republic of Korea
| | - Kija Lee
- Department of Veterinary Medical Imaging, College of Veterinary Medicine, Kyungpook National University, Daegu, Republic of Korea
| | | | - Jin-Kyu Park
- Department of Veterinary Pathology, College of Veterinary Medicine, Kyungpook National University, Daegu, Republic of Korea
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Ramos-Vara JA, Miller MA, Valli VEO. Immunohistochemical Detection of Multiple Myeloma 1/Interferon Regulatory Factor 4 (MUM1/IRF-4) in Canine Plasmacytoma: Comparison with CD79a and CD20. Vet Pathol 2016; 44:875-84. [DOI: 10.1354/vp.44-6-875] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Multiple myeloma oncogene 1/interferon regulatory factor 4 (MUM1/IRF4) is involved in lymphoid cell differentiation, particularly in the production of plasma cells. We examined the immunoreactivity of mouse monoclonal antibody Mum-1p to MUM1/IRF4 and compared it with expression of CD79a and CD20 in 109 plasmacytomas in 107 dogs. Tissues had been fixed in formalin and embedded in paraffin. One hundred one of 109 (93.5%) tumors were positive for MUM1/IRF4. The staining was nuclear with weak cytoplasmic reaction. Fifty-nine of 105 (56.2%) plasmacytomas were positive for CD79a; only 21 of 108 (19.4%) cases were positive for CD20. MUM1/IRF4 staining was performed on 139 other tumors including B- and T-cell lymphomas, histiocytic proliferations, mast cell tumors, and melanocytic tumors. The only MUM1/IRF4-positive nonplasmacytic tumors were 10 B-cell lymphomas and 1 anaplastic lymphoma. We conclude the following: 1) Antibody Mum-1p is very specific for canine plasmacytomas, 2) antibody Mum-1p is superior in sensitivity and specificity to CD79a and CD20 for the identification of canine plasmacytomas in formalin-fixed, paraffin-embedded tissues, 3) canine lymphomas that express MUM1/IRF4 are few and usually of B-cell origin, 4) other canine leukocytic and melanocytic tumors do not express MUM1/IRF4, and 5) prospective studies are needed to determine whether the expression of MUM1/IRF4, particularly in lymphomas, has prognostic significance.
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Affiliation(s)
- J. A. Ramos-Vara
- Animal Disease Diagnostic Laboratory and Department of Comparative Pathobiology, School of Veterinary Medicine, Purdue University, West Lafayette, Indiana
| | - M. A. Miller
- Animal Disease Diagnostic Laboratory and Department of Comparative Pathobiology, School of Veterinary Medicine, Purdue University, West Lafayette, Indiana
| | - V. E. O. Valli
- Department of Pathobiology, College of Veterinary Medicine, University of Illinois, Urbana, IL
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3
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Mikiewicz M, Otrocka-Domagała I, Paździor-Czapula K, Gesek M. Morphology and immunoreactivity of canine and feline extramedullary plasmacytomas. Pol J Vet Sci 2016; 19:345-52. [DOI: 10.1515/pjvs-2016-0042] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The aim of the study was the evaluation of morphology and immunophenotype of canine (19 cases) and feline (7 cases) extramedullary plasmacytomas. Tumours, located in skin, oral cavity and spleen were surgically excised, fixed and processed for histopathology and immunohistochemistry (CD79α, CD18, proliferating cell nuclear antigen, metallothionein). Histologically, tumours were classified into mature, cleaved, asynchronous, polymorphous blastic, hyalin, or monomorphous blastic type. All evaluated tumours showed cytoplasmic expression of CD79α antigen. The expression of CD18 was observed in canine cutaneous and splenic tumours. In canine tumours expression of metallothionein was low to moderate, while in feline plasmacytomas – absent or low. In canine tumours, the mitotic index and proliferating cell nuclear antigen index were positively correlated with the expression of metallothionein. In feline tumours no correlation between mitotic index, proliferating cell nuclear antigen and metallothionein was found. This is the first study describing expression of metallothionein in canine and feline extramedullary plasmacytoma.
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Wright ZM, Rogers KS, Mansell J. Survival Data for Canine Oral Extramedullary Plasmacytomas: A Retrospective Analysis (1996–2006). J Am Anim Hosp Assoc 2008; 44:75-81. [DOI: 10.5326/0440075] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In a 10-year period, extramedullary plasmacytomas (EMP) represented 5.2% of all oral tumors found in the dog (16/302). These 16 oral EMP comprised 28.5% of all EMP within the same time period. Eleven dogs died with a median survival time of 474 days. Five dogs remain alive at the time of this writing. Dogs without complete surgical removal of the EMP and no adjuvant therapy had a median survival time of 138 days. Oral EMP have a clinical behavior consistent with EMP arising from other tissues. They have no obvious correlation with multiple myeloma, and complete surgical resection may be curative.
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Affiliation(s)
- Zachary M. Wright
- Departments of Small Animal Clinical Sciences (Wright) and Veterinary Pathobiology (Mansell), and Office of the Dean (Rogers), College of Veterinary Medicine and Biomedical Sciences, Veterinary Medical Teaching Hospital, Texas A&M University, College Station, Texas 77843
- From the
| | - Kenita S. Rogers
- Departments of Small Animal Clinical Sciences (Wright) and Veterinary Pathobiology (Mansell), and Office of the Dean (Rogers), College of Veterinary Medicine and Biomedical Sciences, Veterinary Medical Teaching Hospital, Texas A&M University, College Station, Texas 77843
- From the
| | - Joanne Mansell
- Departments of Small Animal Clinical Sciences (Wright) and Veterinary Pathobiology (Mansell), and Office of the Dean (Rogers), College of Veterinary Medicine and Biomedical Sciences, Veterinary Medical Teaching Hospital, Texas A&M University, College Station, Texas 77843
- From the
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6
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Hayes AM, Gregory SP, Murphy S, McConnell JF, Patterson-Kane JC. Solitary extramedullary plasmacytoma of the canine larynx. J Small Anim Pract 2007; 48:288-91. [PMID: 17425696 DOI: 10.1111/j.1748-5827.2006.00265.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An 11-year-old, female, spayed cocker spaniel was presented with dysphonia caused by a solitary laryngeal mass. Excisional biopsy was performed, and a diagnosis of plasmacytoma was made on the basis of histological examination. Further investigations showed no signs of systemic involvement. Coarse fractionated radiation therapy failed to control the tumour. Therapy was successfully instituted with a conventional combination chemotherapy protocol over a period of 14 months. The dog remains disease free 30 months after diagnosis. Most solitary, extramedullary plasmacytomas in dogs arise in the gastrointestinal tract, with fewer reports in other sites. The larynx is an uncommon sight of involvement in any species, and to the authors' knowledge, this is the first report of this tumour type in the canine larynx. In contrast to the therapeutic benefits reported in humans, the combination of surgery and radiation therapy was unsuccessful in this case, although sustained remission was gained following chemotherapy.
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Affiliation(s)
- A M Hayes
- Animal Health Trust, Lanwandes Park, Kentford, Newmarket, Suffolk CB8 7UU
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Kupanoff PA, Popovitch CA, Goldschmidt MH. Colorectal Plasmacytomas: A Retrospective Study of Nine Dogs. J Am Anim Hosp Assoc 2006; 42:37-43. [PMID: 16397193 DOI: 10.5326/0420037] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Nine cases of colorectal plasmacytomas diagnosed between 1998 and 2001 were reviewed. Treatment consisted of complete surgical resection when possible. Two dogs had multiple plasmacytomas. Two dogs had local recurrence of the tumor at 5 and 8 months after resection. Two dogs were alive at 20 and 23 months with no recurrences at the time of follow-up. The median survival time was 15 months (range 5 to 33 months). Colorectal plasmacytomas are similar to mucocutaneous plasmacytomas, in that they tend to progress slowly and do not recur with complete excision.
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Affiliation(s)
- Patricia A Kupanoff
- Laboratory of Pathology and Toxicology, University of Pennsylvania, School of Veterinary Medicine, Philadelphia, Pennsylvania 19104, USA
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SCHRENZEL MARKD, NAYDAN DIANEK, MOORE PETERF. Leukocyte differentiation antigens in canine cutaneous and oral plasmacytomas. Vet Dermatol 2005; 9:33-41. [DOI: 10.1046/j.1365-3164.1998.00078.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- MARK D. SCHRENZEL
- University of California, Davis, School of Veterinary Medicine, Department of Pathology, Microbiology, and Immunology, Davis, CA 95616 USA
| | - DIANE K. NAYDAN
- University of California, Davis, School of Veterinary Medicine, Department of Pathology, Microbiology, and Immunology, Davis, CA 95616 USA
| | - PETER F. MOORE
- University of California, Davis, School of Veterinary Medicine, Department of Pathology, Microbiology, and Immunology, Davis, CA 95616 USA
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Aoki M, Kim T, Shimada T, Kuwamura M, Yamate J, Ohashi F. A Primary Hepatic Plasma Cell Tumor in a Dog. J Vet Med Sci 2004; 66:445-7. [PMID: 15133277 DOI: 10.1292/jvms.66.445] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
An 8-year-old female Shetland sheep dog had hyperproteinemia with a monoclonal gammopathy and a solid mass on the liver, which was histologically diagnosed as a plasma cell tumor. After the treatment of surgery and chemotherapy, serum protein level reduced to the normal range and the gammopathy was disappeared. These findings indicate the plasma cell tumor developed primarily from the liver.
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Affiliation(s)
- Mica Aoki
- Laboratories of Veterinary Surgery, Graduate School of Veterinary Medicine, Osaka Prefecture University, Sakai, Japan
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10
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Majzoub M, Breuer W, Platz SJ, Linke RP, Linke W, Hermanns W. Histopathologic and immunophenotypic characterization of extramedullary plasmacytomas in nine cats. Vet Pathol 2003; 40:249-53. [PMID: 12724564 DOI: 10.1354/vp.40-3-249] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
To contribute to the existing body of knowledge in the literature on the apparently rare extramedullary plasmacytoma in cats, lymphoid tumors with plasmacytic cellular morphology taken from nine cats were examined. The paraffin-embedded material was investigated by standard hematoxylin and eosin, and special staining techniques (Giemsa, Congo-red, and periodic acid-Schiff reaction). The tumors also were examined immunohistochemically for the presence of immunoglobulin G, immunoglobulin A, immunoglobulin M, immunoglobulin light chains (lambda, kappa), various amyloid proteins, and FeLV-antigen (p27 protein). An immunoglobulin-producing tumor of plasmacellular origin (extramedullary plasmacytoma [EMP]) could be diagnosed in all cases on the basis of immunohistochemical light-chain expression. All but one of the neoplasms occurred in the skin of older, predominantly male cats. As in humans and dogs, the following types could be identified according to their morphologic features: mature type (two), cleaved type (two), asynchronous type (four), and polymorphous type (one). The tumor tissue of three cats revealed amyloid deposits, which were immunohistochemically diagnosed as ALlambda-amyloid in all three cases.
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Affiliation(s)
- M Majzoub
- Institute of Veterinary Pathology, University of Munich, Munich, Germany
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Platz SJ, Breuer W, Pfleghaar S, Minkus G, Hermanns W. Prognostic value of histopathological grading in canine extramedullary plasmacytomas. Vet Pathol 1999; 36:23-7. [PMID: 9921752 DOI: 10.1354/vp.36-1-23] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The canine extramedullary plasmacytoma (cEMP) has recently been the subject of numerous investigations, indicating that the histomorphologic diagnosis is often difficult because of the variety of morphologic features. Therefore, the objective of this study was to establish a subclassification scheme for cEMPs and to evaluate correlations between the types and malignancy. Retrospectively, 117 cEMPs, all immunohistochemically characterized by a monoclonal immunoglobulin light-chain expression, were collected and assigned to morphologic types. These types were compared using data from a follow-up study on metastasis and tumor recurrence, then compared by proliferation rate, determined by immunohistochemical detection of the antigen Ki-67. Histopathologic typing revealed five different types of cEMPs, ranging from the mature type with typical plasma cells to the polymorphous-blastic type. Between these two forms, three additional types were established: hyaline, cleaved, and asynchronous. Most of the cEMPs were of the cleaved and asynchronous types. In all cEMPs, mononuclear and multinuclear giant cells were present to varying degrees. Although the results of cell proliferation and the follow-up study indicated less benign behavior by the polymorphous-blastic type, the proliferation rate revealed no statistically significant differences among the cEMP types. The clinical data therefore confirmed previous findings that the risk of tumor recurrence and metastasis in general can be classed as low. The established cEMP typing system is probably a very helpful diagnostic tool, although the types cannot be used for a tumor grading system.
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Affiliation(s)
- S J Platz
- Institute of Veterinary Pathology, University of Munich, Germany
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12
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Ramos-Vara JA, Miller MA, Pace LW, Linke RP, Common RS, Watson GL. Intestinal multinodular A lambda-amyloid deposition associated with extramedullary plasmacytoma in three dogs: clinicopathological and immunohistochemical studies. J Comp Pathol 1998; 119:239-49. [PMID: 9807726 DOI: 10.1016/s0021-9975(98)80047-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Intestinal extramedullary plasmacytomas (EMPs) are rare tumours in dogs. Three cases of canine intestinal EMP with amyloid deposits are described in this report. These tumours, which were located in the rectal submucosa, had variable numbers of well-differentiated plasma cells and fewer multinucleated giant cells of plasmacytoid and histiocytic morphology, admixed with abundant amyloid. Two cases had metaplastic cartilage and bone within the amyloid deposits. Immunohistochemically, the plasma cells of all three tumours reacted for lambda-light chains of immunoglobulins but not for kappa-chains, indicating monoclonality. Plasma cells of two tumours were also positive to CD79a antiserum. Amyloid deposits were labelled with an A lambda (amyloid of immunoglobulin lambda-light chain origin) antiserum but not with antisera against its precursor protein, the immunoglobulin lambda-light chains, indicating possible conformational changes of amyloidogenic proteins during their transformation into amyloid.
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Affiliation(s)
- J A Ramos-Vara
- Animal Health Diagnostic Laboratory, Michigan State University, East Lansing 48824, USA
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Abstract
Because of the location of skin tumors, afflicted dogs and cats are frequently presented to veterinarians for examination. The location also facilitates the use of radiation therapy for patients with skin tumors. Few animals treated with radiation therapy for skin tumors experience significant toxicity. Animals with a variety of skin tumors can benefit from treatment with radiation therapy. These tumors include mast cell tumors, squamous cell carcinoma, tumors of the digit, tumors of the ear canal, tumors of the cutaneous adnexa, mammary gland tumors, plasma cell tumors, cutaneous melanoma, cutaneous hemangiosarcoma, and transmissible venereal tumors. The prognosis for individual patients varies with the tumor type and, in some cases, with the stage of the disease.
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Kipar A, Baumgärtner W, Burkhardt E. Round cell sarcomas of possible myelomonocytic origin localized at the lip of aged dogs. ZENTRALBLATT FUR VETERINARMEDIZIN. REIHE A 1995; 42:185-200. [PMID: 8578897 DOI: 10.1111/j.1439-0442.1995.tb00370.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Four round cell tumors, situated at the lip of dogs older than 4 years of age, which could not be further classified, were examined light and electron microscopically, immunocytochemically and in part functionally and cytochemically. Immunocytochemically they were positive for vimentin, but negative for cytokeratin, desmin, neurofilament, synaptophysin, S-100 protein, neuron specific enolase, lysozyme, IgG and a pan-T-cell marker. Cell lines were established from two malignant neoplasms. In vitro, neoplastic cells had morphological, functional and cytochemical properties of myelomonocytic cells. A tumor cell-specific polyclonal rabbit antiserum reacted immunocytochemically positive with primary and recurrent tumors and metastases of the original and the three other round cell tumors. Immunoblotting demonstrated a main band with approximately 65-75 kDa. All four tumors were present in aged dogs and metastasized. They most likely represent a distinct group of malignant tumors among the canine round cell tumors.
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Affiliation(s)
- A Kipar
- Institut für Veterinär-Pathologie, Justus-Liebig-Universität Giessen, Germany
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Brunnert SR, Altman NH. Identification of immunoglobulin light chains in canine extramedullary plasmacytomas by thioflavine T and immunohistochemistry. J Vet Diagn Invest 1991; 3:245-51. [PMID: 1911998 DOI: 10.1177/104063879100300312] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Extramedullary plasmacytomas were studied in 29 dogs. The site at which tumors occurred and the age and sex of the dogs were similar to those in previous reports. The skin of the digits, chin, ear, and lip represented the most common (17/29) tumor sites. Males and females were equally represented, and tumors occurred in middle-aged to old dogs (mean age, 9.0 years). A breed predilection was seen in the Cocker Spaniel (n = 7; 24%); Cocker Spaniels represented only 4% (210/4,725) of the submissions during the same period. Tumors were stained with immunohistochemical markers (lambda light chain, K light chain) and thioflavine T. Immunoreactivity was limited to either lambda or K light chains, consistent with a monoclonal plasma cell population. The majority of tumors expressed lambda light chains, consistent with previously reported canine plasma cell dyscrasias. Thioflavine T cytoplasmic fluorescence was seen in the majority (18/29) of plasmacytomas and with inflammatory plasma cells present in control specimens. Other round cell neoplasms (lymphosarcoma, histiocytoma, and mastocytoma) were negative with thioflavine T, indicating that positive staining with thioflavine T was specific for plasma cells (neoplastic and inflammatory). This study confirms by immunohistochemistry that canine extramedullary plasmacytomas disproportionately express lambda light chains and establishes thioflavine T staining as a rapid histochemical method for diagnosis of these tumors.
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Affiliation(s)
- S R Brunnert
- Department of Pathology, University of Miami School of Medicine, FL 33101
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Abstract
Cutaneous plasmacytomas associated with local deposition of amyloid were diagnosed by light microscopy in a series of six older dogs (mean age 10.7 years) consisting of two Cocker Spaniels, a Poodle, a Weimeraner, and two mixed-breed dogs. The neoplasms occurred on the digits (2 dogs), forelimb (2 dogs), lip (1 dog), and ear (1 dog). In most cases, groups of neoplastic plasma cells were widely separated by large homogeneous islands of amyloid. The neoplastic cells had characteristic plasmacytoid features, but the degree of pleomorphism varied greatly between different neoplasms. In four of the six tumors, the diagnosis of plasmacytoma was confirmed by the demonstration of a monoclonal plasma cell population using immunofluorescent staining for anti-canine immunoglobulins. In these tumors, the neoplastic cells reacted with only one class of immunoglobulins (IgG). The amyloid did not react with any of the reagents used. The suspicion that the amyloid was of immunoglobulin origin (primary amyloid) was supported by its retention of birefringence under polarized light after treatment with potassium permanganate and staining with Congo red.
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Affiliation(s)
- P H Rowland
- Department of Pathology, New York State College of Veterinary Medicine, Cornell University, Ithaca
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17
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Baer KE, Patnaik AK, Gilbertson SR, Hurvitz AI. Cutaneous plasmacytomas in dogs: a morphologic and immunohistochemical study. Vet Pathol 1989; 26:216-21. [PMID: 2669312 DOI: 10.1177/030098588902600305] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Forty-nine cutaneous plasmacytomas in 46 dogs were studied. Tumors occurred at solitary sites in middle-aged to old dogs (mean age, 9.7 years) and most commonly involved the skin of the digits, lips, and ears. Initial diagnosis was made on the basis of light microscopic morphologic findings. Tumors were graded according to the extent of cellular differentiation and immunoreactivity to a panel of immunohistochemical markers (cytokeratins, canine IgG F[ab]2, neurofilament, neuron-specific enolase, S-100 protein, and vimentin). Immunoreactivity was limited to antibodies directed at canine IgG F(ab)2 and vimentin. Vimentin immunoreactivity was usually greater than that of canine IgG F(ab)2, but there was no correlation between immunoreactivity and histologic grade of the tumors. Thirty-six of 39 dogs (92.3%) followed (mean follow-up, 13 months) were cured by surgical excision. The results of this study indicate that canine cutaneous plasmacytomas are benign neoplasms that should be included in the differential diagnosis of cutaneous round cell tumors in dogs.
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Affiliation(s)
- K E Baer
- Department of Pathology, Animal Medical Center, New York, NY
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Kyriazidou A, Brown PJ, Lucke VM. An immunohistochemical study of canine extramedullary plasma cell tumours. J Comp Pathol 1989; 100:259-66. [PMID: 2498400 DOI: 10.1016/0021-9975(89)90103-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Twenty-three cases of dog plasma cell tumours were investigated for the presence of monoclonal cytoplasmic immunoglobulin light chain types and heavy chain classes. The peroxidase-antiperoxidase method was applied to formalin-fixed, paraffin-embedded tissues, available as stored blocks. Twenty tumours showed a monoclonal light chain type and heavy chain class pattern, two showed a monoclonal light chain type and a biclonal heavy chain class pattern, findings which confirmed the neoplastic nature of the plasma cells. One tumour did not stain with any of the antisera. The results indicate that the method reliably establishes the monoclonality and, consequently, the neoplastic nature of plasma cell proliferations.
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Affiliation(s)
- A Kyriazidou
- University of Bristol, School of Veterinary Science, U.K
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Kyriazidou A, Brown PJ, Lucke VM. Immunohistochemical staining of neoplastic and inflammatory plasma cell lesions in feline tissues. J Comp Pathol 1989; 100:337-41. [PMID: 2470792 DOI: 10.1016/0021-9975(89)90113-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Two cases of feline plasmacytoma and nine cases of reactive plasma cell proliferations were examined for the presence of cytoplasmic immunoglobulin light chain types and heavy chain classes, by the peroxidase-anti-peroxidase technique on sections of formalin-fixed, paraffin-embedded tissues. This immunohistochemical technique is an important aid to conventional histological techniques. It helps to differentiate between neoplastic and dense inflammatory plasma cell proliferations by determining the presence of one, or more than one, light chain types in the cells, which corresponds with their neoplastic or reactive nature.
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Affiliation(s)
- A Kyriazidou
- University of Bristol, School of Veterinary Science, U.K
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