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Cagle LA, Maisel M, Conrado FO, Wait C, Peper K, Lochhead T, Vo T, Dolan JK, de Oliveira HH, Bosch S, Walker R, Fox-Alvarez SA, Porter E, Carrera-Justiz S, Lanier CJ, Hoffmann AR, Dark MJ, Sharkey LC. Telangiectatic osteosarcoma in four dogs: Cytologic, histopathologic, cytochemical, and immunohistochemical findings. Vet Clin Pathol 2024; 53:85-92. [PMID: 38418390 DOI: 10.1111/vcp.13338] [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: 07/05/2023] [Revised: 12/21/2023] [Accepted: 01/24/2024] [Indexed: 03/01/2024]
Abstract
Telangiectatic osteosarcoma is a rare variant of osteosarcoma histologically and clinically similar to hemangiosarcoma (HSA). This case series describes the imaging and cytologic features of four histologically confirmed telangiectatic osteosarcomas, including the use of cytochemical stains. Alkaline phosphatase (ALP) was applied to Wright-Giemsa-stained cytology slides, and Factor VIII immunohistochemistry was evaluated. Cytologic characteristics included atypical mesenchymal cells with evidence of acute and chronic hemorrhage. Telangiectatic osteosarcoma cases had positive ALP cytochemical staining, while control HSA cases were negative. Factor VIII immunohistochemistry was negative in telangiectatic osteosarcoma and positive in HSA. Cytologic diagnosis of telangiectatic osteosarcoma with positive ALP cytochemical staining can help differentiate this neoplasm from HSA.
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Affiliation(s)
- Laura A Cagle
- Department of Comparative, Diagnostic, and Population Medicine, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Morgan Maisel
- Department of Comparative, Diagnostic, and Population Medicine, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Francisco O Conrado
- Department of Comparative Pathobiology, Cummings School of Veterinary Medicine, Tufts University, North Grafton, Massachusetts, USA
| | - Courtney Wait
- Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Katherine Peper
- Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Tannis Lochhead
- Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Thao Vo
- Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Jacqueline K Dolan
- Department of Comparative, Diagnostic, and Population Medicine, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Helena Hauck de Oliveira
- Department of Comparative, Diagnostic, and Population Medicine, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Sarah Bosch
- Department of Comparative, Diagnostic, and Population Medicine, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Randall Walker
- Department of Comparative, Diagnostic, and Population Medicine, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Stacey A Fox-Alvarez
- Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Erin Porter
- Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Sheila Carrera-Justiz
- Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Christopher J Lanier
- Department of Comparative, Diagnostic, and Population Medicine, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Aline Rodrigues Hoffmann
- Department of Comparative, Diagnostic, and Population Medicine, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Michael J Dark
- Department of Comparative, Diagnostic, and Population Medicine, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Leslie C Sharkey
- Department of Clinical Sciences, Cummings School of Veterinary Medicine, Tufts University, North Grafton, Massachusetts, USA
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Norquest CJ, Rogic A, Gimotty PA, Maitz CA, Rindt H, Ashworth HL, Bryan JN, Donnelly LL, McCleary-Wheeler AL, Flesner BK. Effects of neoadjuvant zoledronate and radiation therapy on cell survival, cell cycle distribution, and clinical status in canine osteosarcoma. Front Vet Sci 2024; 11:1237084. [PMID: 38362299 PMCID: PMC10867971 DOI: 10.3389/fvets.2024.1237084] [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: 06/08/2023] [Accepted: 01/12/2024] [Indexed: 02/17/2024] Open
Abstract
Introduction Zoledronic acid (ZOL) is a third-generation bisphosphonate with a higher affinity for bone resorption areas than earlier bisphosphonates (i.e., pamidronate, PAM). In human medicine, ZOL provides improved bone pain relief and prolonged time to skeletal-related events compared to its older generational counterparts. Preclinical studies have investigated its role as an anti-neoplastic agent, both independently and synergistically, with radiation therapy (RT). ZOL and RT act synergistically in several neoplastic human cell lines: prostate, breast, osteosarcoma, and fibrosarcoma. However, the exact mechanism of ZOL's radiosensitization has not been fully elucidated. Methods We investigated ZOL's ability to induce apoptosis in canine osteosarcoma cell lines treated with various doses of megavoltage external beam radiotherapy. Second, we evaluated cell cycle arrest in ZOL-treated cells to assess several neo-adjuvant time points. Finally, we treated 20 dogs with naturally occurring appendicular OS with 0.1 mg/kg ZOL IV 24 h before receiving 8 Gy of RT (once weekly fraction x 4 weeks). Results We found that apoptosis was increased in all ZOL-treated cell lines compared to controls, and the combination of ZOL and RT resulted in dissimilar apoptosis between Abrams and D-17 and HMPOS cell lines. Cell cycle arrest (G2/M phase) was minimal and variable between cell lines but perhaps greatest at 48 h post-ZOL treatment. Only 10% of dogs treated with ZOL and RT developed pathologic fractures, compared to 44% of dogs historically treated with PAM and RT (p = 0.027). Discussion ZOL and RT appear to be a well-tolerated combination treatment scheme for non-surgical candidates; future studies must elucidate the ideal timing of ZOL.
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Affiliation(s)
- Carissa J. Norquest
- Department of Veterinary Medicine & Surgery, University of Missouri College of Veterinary Medicine, Columbia, MO, United States
| | - Anita Rogic
- Department of Veterinary Medicine & Surgery, University of Missouri College of Veterinary Medicine, Columbia, MO, United States
| | - Phyllis A. Gimotty
- Department of Biostatistics, Epidemiology and Informatics, University of Pennsylvania School of Medicine, Philadelphia, PA, United States
| | - Charles A. Maitz
- Department of Veterinary Medicine & Surgery, University of Missouri College of Veterinary Medicine, Columbia, MO, United States
| | - Hansjorg Rindt
- Department of Veterinary Medicine & Surgery, University of Missouri College of Veterinary Medicine, Columbia, MO, United States
| | - Hayley L. Ashworth
- Department of Veterinary Medicine & Surgery, University of Missouri College of Veterinary Medicine, Columbia, MO, United States
| | - Jeffrey N. Bryan
- Department of Veterinary Medicine & Surgery, University of Missouri College of Veterinary Medicine, Columbia, MO, United States
| | - Lindsay L. Donnelly
- Department of Veterinary Medicine & Surgery, University of Missouri College of Veterinary Medicine, Columbia, MO, United States
| | - Angela L. McCleary-Wheeler
- Department of Veterinary Medicine & Surgery, University of Missouri College of Veterinary Medicine, Columbia, MO, United States
| | - Brian K. Flesner
- Department of Veterinary Medicine & Surgery, University of Missouri College of Veterinary Medicine, Columbia, MO, United States
- Department of Clinical Sciences & Advanced Medicine, University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA, United States
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3
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Etzioni AL. Osteosarcoma diagnosed in a dog using a formalin‐fixed fine‐needle aspirate biopsy. Vet Clin Pathol 2022; 51:349-355. [DOI: 10.1111/vcp.13056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 06/14/2021] [Accepted: 06/23/2021] [Indexed: 11/28/2022]
Affiliation(s)
- Athema L. Etzioni
- Department of Pathobiology Tuskegee University College of Veterinary Medicine Tuskegee Alabama USA
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Barger A, Baker K, Driskell E, Sander W, Roady P, Berry M, Schnelle A, Fan TM. The use of alkaline phosphatase and runx2 to distinguish osteosarcoma from other common malignant primary bone tumors in dogs. Vet Pathol 2022; 59:427-432. [PMID: 35253545 DOI: 10.1177/03009858221083035] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/08/2023]
Abstract
In dogs, primary bone tumors can be difficult to distinguish with histopathology. Of those tumors, osteosarcoma (OSA) is the most common and aggressive. In this study, 4 immunohistochemistry markers-alkaline phosphatase (ALP), osteonectin (ON), osteopontin (OP), and runx2-were evaluated for their ability to distinguish OSA from other primary bone tumors. The 42 formalin-fixed, paraffin-embedded, primary canine bone tumors included 15 OSAs, 8 chondrosarcomas, 11 fibrosarcomas, and 8 histiocytic sarcomas. All 4 antibodies were highly sensitive for detection of osteosarcoma. ALP was the most sensitive at 100% and runx2 the most specific at 78%. Running ALP and runx2 in series resulted in a sensitivity of 87% and a specificity of 85%. This combination of immunomarkers resulted in a diagnostic panel for distinguishing osteosarcoma from other primary bone tumors.
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Affiliation(s)
- Anne Barger
- University of Illinois at Urbana-Champaign, Urbana, IL
| | | | | | - Will Sander
- University of Illinois at Urbana-Champaign, Urbana, IL
| | - Patrick Roady
- University of Illinois at Urbana-Champaign, Urbana, IL
| | - Matthew Berry
- University of Illinois at Urbana-Champaign, Urbana, IL
| | - Amy Schnelle
- University of Illinois at Urbana-Champaign, Urbana, IL
| | - Timothy M Fan
- University of Illinois at Urbana-Champaign, Urbana, IL
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Faletti T, Seguin B, Selmic LE, Lapsley J, Worley D, Griffin M, Tremolada G. Potential Seeding From Fine-Needle Aspiration of an Axial Osteosarcoma: A Case Report. Front Vet Sci 2022; 9:847933. [PMID: 35573421 PMCID: PMC9101296 DOI: 10.3389/fvets.2022.847933] [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: 01/03/2022] [Accepted: 03/24/2022] [Indexed: 12/01/2022] Open
Abstract
This report describes the first potential case of seeding after fine-needle aspiration (FNA) of a rib osteosarcoma in a dog. An 8-year-old, 28-kg female spayed Golden Retriever was presented to her primary veterinarian with a 3-week history of a 3-cm firm, unpainful, immobile mass arising from the 9th rib. The mass was aspirated and submitted for cytological examination. A subcutaneous nodule developed several days after the FNA was performed in a location immediately overlying but distinct from the primary rib tumor on palpation. Both the primary mass and the newly diagnosed subcutaneous nodule were biopsied and were consistent with an osteosarcoma. Although it cannot be ruled out that the subcutaneous lesion was metastatic, seeding was a reasonable explanation based on where the new mass was located and how quickly it appeared after the FNA was performed. The aim of this case report was to describe the possibility of tumor seeding during FNA for osteosarcoma. It is the authors' opinion that utility of cytological diagnosis of bone tumors outweighs the risk of possible seeding and should continue to be used as a routine diagnostic test for the diagnosis of aggressive bone lesions.
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Affiliation(s)
- Tasha Faletti
- Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, OH, United States
| | - Bernard Seguin
- College of Veterinary Medicine Flint Animal Cancer Center, Colorado State University, Fort Collins, CO, United States
| | - Laura Elizabeth Selmic
- Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, OH, United States
| | - Janis Lapsley
- Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, OH, United States
| | - Deanna Worley
- College of Veterinary Medicine Flint Animal Cancer Center, Colorado State University, Fort Collins, CO, United States
| | - Maureen Griffin
- College of Veterinary Medicine Flint Animal Cancer Center, Colorado State University, Fort Collins, CO, United States
| | - Giovanni Tremolada
- Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, OH, United States
- *Correspondence: Giovanni Tremolada
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Jifcovici A, Murphy S. What Is Your Diagnosis? J Am Vet Med Assoc 2022; 260:861-863. [PMID: 35175926 DOI: 10.2460/javma.20.03.0131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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7
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Luu AK, Wood GA, Viloria-Petit AM. Recent Advances in the Discovery of Biomarkers for Canine Osteosarcoma. Front Vet Sci 2021; 8:734965. [PMID: 34660770 PMCID: PMC8517113 DOI: 10.3389/fvets.2021.734965] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 09/03/2021] [Indexed: 12/14/2022] Open
Abstract
Canine osteosarcoma (OSA) is an aggressive malignancy that frequently metastasizes to the lung and bone. Not only has there been essentially no improvement in therapeutic outcome over the past 3 decades, but there is also a lack of reliable biomarkers in clinical practice. This makes it difficult to discriminate which patients will most benefit from the standard treatment of amputation and adjuvant chemotherapy. The development of reliable diagnostic biomarkers could aid in the clinical diagnosis of primary OSA and metastasis; while prognostic, and predictive biomarkers could allow clinicians to stratify patients to predict response to treatment and outcome. This review summarizes biomarkers that have been explored in canine OSA to date. The focus is on molecular biomarkers identified in tumor samples as well as emerging biomarkers that have been identified in blood-based (liquid) biopsies, including circulating tumor cells, microRNAs, and extracellular vesicles. Lastly, we propose future directions in biomarker research to ensure they can be incorporated into a clinical setting.
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Affiliation(s)
- Anita K Luu
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Geoffrey A Wood
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Alicia M Viloria-Petit
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
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Sharma S, Boston SE, Mosley C, Boylan M. Internal hemipelvectomy with ischiectomy, partial acetabulectomy, and femoral head and neck excision in a cat with a pelvic osteochondroma. J Am Vet Med Assoc 2021; 259:401-405. [PMID: 34337962 DOI: 10.2460/javma.259.4.401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
CASE DESCRIPTION A 2-year-old 5.1-kg (11.2-lb) castrated male Siberian cat was examined because of a history of an abnormal right pelvic limb gait and a 4- to 5-month history of progressive constipation. Radiographs obtained by the referring veterinarian showed an osteoproductive and osteolytic bony lesion that involved the right ischium and filled the obturator foramen. CLINICAL FINDINGS A hard mass was palpable in the right inguinal area, and rectal examination revealed a smooth bony mass on the ventral aspect of the right pelvic floor with marked reduction in the pelvic canal space. A 3.9 × 3 × 4.6-cm, mineralized mass bridging the right obturator foramen was present on CT images. The ventral component of the mass was slightly larger than its dorsal component, and lysis of the right pubic bone was present. There was no obvious soft tissue involvement. TREATMENT AND OUTCOME A limb salvage procedure involving internal hemipelvectomy with ipsilateral ischiectomy, contralateral partial ischiectomy, ipsilateral partial acetabulectomy, and femoral head and neck excision was performed. Histologic examination revealed that the mass was an osteochondroma. The cat recovered well and had good functional limb use immediately after surgery. The cat was still alive 1 year after surgery with good limb use. CLINICAL RELEVANCE Internal hemipelvectomy involving ischiectomy, partial acetabulectomy, and femoral head and neck excision can result in a good functional outcome in cats if the procedure is planned appropriately with a full understanding of the regional anatomy and adherence to surgical oncologic principles.
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Dittmer KE, Pemberton S. A Holistic Approach to Bone Tumors in Dogs and Cats: Radiographic and Histologic Correlation. Vet Pathol 2021; 58:841-857. [PMID: 33779406 DOI: 10.1177/0300985821999832] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The skeletal system is a common site for neoplasia in dogs and cats, and primary bone tumors may develop from any of the mesenchymal tissues present in bone. Imaging and histopathology are routinely used in the diagnosis of bone tumors, and the 2 techniques are highly complementary. While imaging may be highly suggestive of a specific diagnosis and treatment may be instituted based on this, definitive diagnosis requires histopathology of either incisional or excisional biopsies or an amputation specimen. However, there are a number of diagnostic dilemmas when the pathologist interprets bone biopsy samples, such as distinguishing reactive bone and tumor bone, fracture callus and tumor bone, different benign fibro-osseous lesions, and different types of bone sarcoma. This review outlines the characteristic radiographic and histologic changes associated with these diagnostic problems to aid in resolving them. When a holistic approach is taken to evaluation of the signalment, history, and clinical, radiologic, and microscopic features, a diagnosis may be possible. The pathologist is greatly assisted in the interpretation of bone samples by having access to imaging and should routinely request either the images or the imaging reports if they are not received from submitting veterinarians.
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10
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Bai LP, Lv JX, Kong LW, Cao HY, Jin Y. Application of modified closed biopsy in rabbit model of VX2-transplanted bone tumor. J Orthop Surg Res 2021; 16:204. [PMID: 33743772 PMCID: PMC7980360 DOI: 10.1186/s13018-021-02333-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 03/02/2021] [Indexed: 11/10/2022] Open
Abstract
Background This study was aimed to explore the application value of modified closed biopsy technique in puncture biopsy of rabbit VX2 transplanted bone tumor model. Methods VX2 tumor was transplanted into the bilateral tibia of 30 rabbits through the tibial plateau to make the model of VX2 transplanted bone tumor. Seven days after modeling, the proximal tibia biopsy was performed under the guidance of X-ray, and the biopsy specimen was examined pathologically. The left leg was biopsied with modified closed biopsy technique (experimental group), and the right leg was biopsied with hollow needle (control group). After 14 days of modeling, all rabbits were killed after X-ray examination around the puncture hole, and the soft tissue around the puncture hole was taken for pathological examination, and the expression levels of PCNA and CD34 in the tissue extract were detected by enzyme-linked immunosorbent assay (ELISA). Results By the end of the experiment, a total of 3 rabbits died, and finally, 27 rabbits were included in the study. Tumor cells were detected in all the intramedullary specimens obtained by puncture biopsy. On the 14th day after modeling, X-ray showed that the occurrence rate of periosteal reaction and extraosseous high-density shadow around the puncture hole was 14.81% (4/27) in the experimental group and 40.74% (11/27) in the control group. The difference was statistically significant (P<0.05). The pathological results of soft tissue around the puncture hole showed that the tumor cell metastasis rate was 29.63% (8/27) in the experimental group and 100% (27/27) in the control group, and the difference was statistically significant (P<0.05). The expression levels of PCNA and CD34 in the experimental group were lower than those in the control group (P < 0.05). Conclusion Both the modified closed biopsy technique and needle aspiration biopsy can provide sufficient biopsy tissue for the diagnosis of VX2-transplanted bone tumor in rabbits. At the same time, the improved closed biopsy technique has a certain application value in preventing local metastasis of tumor cells along the puncture channel.
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Affiliation(s)
- Lei Peng Bai
- Department of Orthopaedics, Affiliated Hospital of Chengde Medical College, 36 Nanyingzi Street, Chengde, Hebei, 067000, People's Republic of China
| | - Jia Xing Lv
- Department of Orthopaedics, Affiliated Hospital of Chengde Medical College, 36 Nanyingzi Street, Chengde, Hebei, 067000, People's Republic of China
| | - Ling Wei Kong
- Department of Orthopaedics, Affiliated Hospital of Chengde Medical College, 36 Nanyingzi Street, Chengde, Hebei, 067000, People's Republic of China
| | - Hai Ying Cao
- Department of Orthopaedics, Affiliated Hospital of Chengde Medical College, 36 Nanyingzi Street, Chengde, Hebei, 067000, People's Republic of China
| | - Yu Jin
- Department of Orthopaedics, Affiliated Hospital of Chengde Medical College, 36 Nanyingzi Street, Chengde, Hebei, 067000, People's Republic of China.
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11
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Martin TW, Griffin L, Custis J, Ryan SD, Lafferty M, Boss MK, Regan D, Rao S, Leary D, Withrow SJ, LaRue SM. Outcome and prognosis for canine appendicular osteosarcoma treated with stereotactic body radiation therapy in 123 dogs. Vet Comp Oncol 2021; 19:284-294. [PMID: 33403752 DOI: 10.1111/vco.12674] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 12/29/2020] [Accepted: 12/29/2020] [Indexed: 12/15/2022]
Abstract
Canine appendicular osteosarcoma is commonly treated with limb amputation; however, limb-sparing options are frequently desired or necessary for a subset of patients. We evaluated 123 patients and 130 sites treated with stereotactic body radiation therapy (SBRT). Eighty-two out of 98 dogs (84%) had maximum lameness improvement at a median of 3 weeks for a median of 6 months duration. Histopathologic evaluation of available samples from amputation or necropsy revealed >80% tumor necrosis in 50% of limbs consistent with local disease control. Of evaluable patients, 41% fractured and 21% pursued an amputation after treatment. Fine needle aspirate (n = 52) and needle core biopsy (n = 28) did not result in increased fracture risk compared to those without tumor sampling (n = 50). Median survival time (MST) was 233 days and time to first event was 143 days. Gross tumor volume and planned target volume were significantly inversely associated with survival and tumor location was significantly associated with survival. Dogs with salvage amputation had a significantly longer MST compared to those without (346 vs 202 days; P = .04). The presence of metastatic disease at the time of treatment in 15 dogs did not significantly impact survival time (200 vs 237 days without metastasis; P = .58). Skin side effects correlated significantly with dose with 33% of patients with acute grade 3 effects developing consequential late grade 3 effects. While SBRT improves lameness in most patients, further investigation is needed to identify candidates with minimal early fracture risk prior to initiating therapy.
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Affiliation(s)
- Tiffany Wormhoudt Martin
- Department of Environment and Radiological Health Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA
| | - Lynn Griffin
- Department of Environment and Radiological Health Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA
| | - James Custis
- Department of Radiation Oncology, VCA Animal Diagnostic Clinic, Dallas, Texas, USA
| | - Stewart D Ryan
- Veterinary Clinical Sciences, The University of Melbourne, Victoria, Australia
| | - Mary Lafferty
- Department of Clinical Science, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA
| | - Mary-Keara Boss
- Department of Environment and Radiological Health Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA
| | - Daniel Regan
- Department of Microbiology, Immunology, and Pathology College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA
| | - Sangeeta Rao
- Department of Clinical Science, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA
| | - Del Leary
- Department of Environment and Radiological Health Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA
| | - Stephen J Withrow
- Department of Clinical Science, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA
| | - Susan M LaRue
- Department of Environment and Radiological Health Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA
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Lapsley J, Selmic LE. Common Neoplastic Diseases Affecting the Forelimb. Vet Clin North Am Small Anim Pract 2021; 51:343-356. [PMID: 33446363 DOI: 10.1016/j.cvsm.2020.11.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Lameness, new swelling, or mass occurrence are the most common reasons for presentation when neoplasia affects the limbs. Tumors of the skin or subcutaneous tissues, joints, muscles, bones, or digits of the forelimb are reported. Diagnosis with fine needle aspiration or biopsy is necessary before treatment to allow staging, planning of treatment, and prognostication. The planning of surgical treatment of limb tumors is essential to maximize the chance of a complete resection on the first surgery, given that less skin is available for primary closure in subsequent revision or recurrence surgeries.
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Affiliation(s)
- Janis Lapsley
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, 601 Vernon L Tharp Street, Columbus, OH 43210, USA
| | - Laura E Selmic
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, 601 Vernon L Tharp Street, Columbus, OH 43210, USA.
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Woods GA, Simpson M, Boag A, Paris J, Piccinelli C, Breheny C. Complications associated with bone marrow sampling in dogs and cats. J Small Anim Pract 2020; 62:209-215. [PMID: 33274762 DOI: 10.1111/jsap.13274] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 10/27/2020] [Accepted: 11/03/2020] [Indexed: 12/18/2022]
Abstract
OBJECTIVES To evaluate the prevalence of complications during bone marrow sampling and associated patient and procedural factors in dogs and cats. MATERIALS AND METHODS Retrospective cohort study, records were evaluated to identify dogs and cats that had bone marrow sampling between 2012 and 2019. Data including signalment, the presence of specific clinicopathological findings, anatomical site of bone marrow sampling, number of attempts, diagnostic quality of sampling, analgesia protocol and complications postprocedure were recorded. RESULTS A total of 131 dogs and 29 cats were included in the study. Complications were recorded in 22 of 160 (14%) of cases. Pain was the most common complication of bone marrow sampling in 20 of 22 (91%) of cases with bruising reported in the remaining patients. A local anaesthetic block was used in 98 of 160 (61%) of patients. CLINICAL SIGNIFICANCE Excluding pain, complications associated with bone marrow sampling were rare and no clear association were detected between patient or procedural variables. Haemorrhage and infection are rare complications in dogs and cats when thrombocytopenia and neutropenia are present. Peri-procedure analgesia is strongly recommended to minimise complications.
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Affiliation(s)
- G A Woods
- Hospital for Small Animals, Royal (Dick) School of Veterinary Studies, University of Edinburgh, EH25 9RG, UK
| | - M Simpson
- Hospital for Small Animals, Royal (Dick) School of Veterinary Studies, University of Edinburgh, EH25 9RG, UK
| | - A Boag
- Hospital for Small Animals, Royal (Dick) School of Veterinary Studies, University of Edinburgh, EH25 9RG, UK.,The Queen's Medical Research Institute, Centre for Cardiovascular Science, University of Edinburgh, EH16 4T, UK
| | - J Paris
- Hospital for Small Animals, Royal (Dick) School of Veterinary Studies, University of Edinburgh, EH25 9RG, UK
| | - C Piccinelli
- Hospital for Small Animals, Royal (Dick) School of Veterinary Studies, University of Edinburgh, EH25 9RG, UK.,Easter Bush Pathology, Royal (Dick) School of Veterinary Studies, University of Edinburgh, EH25 9RG, UK
| | - C Breheny
- Hospital for Small Animals, Royal (Dick) School of Veterinary Studies, University of Edinburgh, EH25 9RG, UK
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Townsend AM, Valenzano DM, Epperly EE. What Is Your Diagnosis? J Am Vet Med Assoc 2020; 256:977-980. [PMID: 32301663 DOI: 10.2460/javma.256.9.977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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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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16
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Sharma S, Boston SE, Riddle D, Isakow K. Osteosarcoma of the proximal tibia in a dog 6 years after tibial tuberosity advancement. THE CANADIAN VETERINARY JOURNAL = LA REVUE VETERINAIRE CANADIENNE 2020; 61:946-950. [PMID: 32879518 PMCID: PMC7424941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A 9-year-old spayed female Cane Corso dog was presented with a 1-week history of an acute right hind limb non-weight-bearing lameness. Six years previously, a right tibial tuberosity advancement (TTA) procedure had been performed. Orthogonal radiographs of the right pelvic limb taken before presentation revealed a comminuted displaced mid-diaphyseal tibial fracture. An aggressive bone lesion with osteolysis and periosteal reaction of the proximal tibia were evident that were most consistent with a primary bone tumor. The owner elected to have the dog euthanized. After euthanasia a fine-needle aspirate of the right proximal tibia was submitted for clinical pathology. Cytology and alkaline phosphatase staining of the fine-needle aspirate were consistent with osteosarcoma. Key clinical message: To the authors' knowledge, this is only the second reported case of osteosarcoma at the site of a TTA. Implantassociated osteosarcoma has been associated with tibial plateau levelling osteotomy (TPLO) and fracture repair.
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Affiliation(s)
- Surabhi Sharma
- Surgical Oncology Department (Sharma, Boston), Emergency Department (Riddle), Surgery Department (Isakow), VCA 404 Veterinary Emergency and Referral Hospital, 510 Harry Walker Parkways South, Newmarket, Ontario
| | - Sarah E Boston
- Surgical Oncology Department (Sharma, Boston), Emergency Department (Riddle), Surgery Department (Isakow), VCA 404 Veterinary Emergency and Referral Hospital, 510 Harry Walker Parkways South, Newmarket, Ontario
| | - Douglas Riddle
- Surgical Oncology Department (Sharma, Boston), Emergency Department (Riddle), Surgery Department (Isakow), VCA 404 Veterinary Emergency and Referral Hospital, 510 Harry Walker Parkways South, Newmarket, Ontario
| | - Kevin Isakow
- Surgical Oncology Department (Sharma, Boston), Emergency Department (Riddle), Surgery Department (Isakow), VCA 404 Veterinary Emergency and Referral Hospital, 510 Harry Walker Parkways South, Newmarket, Ontario
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17
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Poon AC, Matsuyama A, Mutsaers AJ. Recent and current clinical trials in canine appendicular osteosarcoma. THE CANADIAN VETERINARY JOURNAL = LA REVUE VETERINAIRE CANADIENNE 2020; 61:301-308. [PMID: 32165755 PMCID: PMC7020630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Osteosarcoma (OSA) is an aggressive primary bone tumor in the domestic dog that most often occurs within the appendicular skeleton. Despite the use of adjuvant chemotherapy, most dogs succumb to metastatic disease within 1 year of diagnosis. To improve this outcome, substantial research is currently focused on investigating novel therapies. Herein, we review emerging treatments and clinical trials that, if proven efficacious, could revolutionize the standard of care for canine appendicular OSA. This article includes a critical perspective on the safety, efficacy, and limitations of select immunotherapy, virotherapy, radiotherapy, targeted therapy, and personalized medicine trials, all of which reflect similar investigations taking place in human oncology. These clinical trials represent a major evolution in the overall approach to therapy for dogs with appendicular OSA that could have significant implications for improving survival.
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Affiliation(s)
- Andrew C Poon
- Department of Biomedical Sciences (Poon, Matsuyama, Mutsaers), Department of Clinical Studies (Mutsaers), Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1
| | - Arata Matsuyama
- Department of Biomedical Sciences (Poon, Matsuyama, Mutsaers), Department of Clinical Studies (Mutsaers), Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1
| | - Anthony J Mutsaers
- Department of Biomedical Sciences (Poon, Matsuyama, Mutsaers), Department of Clinical Studies (Mutsaers), Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1
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18
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Wright T, Brisson BA, Wood GA, Oblak M, Mutsaers AJ, Sabine V, Skowronski K, Belanger C, Tiessen A, Bienzle D. Flow Cytometric Detection of Circulating Osteosarcoma Cells in Dogs. Cytometry A 2019; 95:997-1007. [PMID: 31282052 DOI: 10.1002/cyto.a.23847] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 05/20/2019] [Accepted: 06/12/2019] [Indexed: 12/16/2022]
Abstract
Osteosarcoma (OSA) is a malignant tumor of middle-aged dogs and adolescent humans. The clinical outcome of OSA has not improved over more than three decades, and dogs typically succumb to metastatic disease within 6 months despite tumor resection through limb amputation and adjuvant chemotherapy. Therefore, undetectable tumor cells with potential to form metastases are present at diagnosis. An assay to identify canine immortalized and primary OSA cells through flow cytometric detection of intracellular collagen 1 (Col I) and osteocalcin was optimized, and applied to blood samples from tumor-bearing dogs for detection of circulating tumor cells (CTCs). Spiking variable number of OSA cells into normal dog blood recovered 50-60% of Col I positive cells with high forward and variable side light scatter. An algorithm to exclude nonviable, doublet, and autofluorescent cells was applied to sequential blood samples from three dogs obtained prior to and after limb amputation, and at approximately, triweekly intervals over 121, 142, and 183 days of chemotherapy, respectively. Dogs had >100 CTC/106 leukocytes prior to amputation, variably frequent CTC during chemotherapy, and an increase up to 4,000 CTC/106 leukocytes within 4 weeks before overt metastases or death. Sorted CTCs were morphologically similar to direct tumor aspirates and positive for Col I. Although preliminary, findings suggest that CTCs are frequent in canine OSA, more numerous than carcinoma CTC in humans, and that an increase in CTC frequency may herald clinical deterioration. This assay may enable enumeration and isolation of OSA CTC for prognostic and functional studies, respectively. © 2019 International Society for Advancement of Cytometry.
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Affiliation(s)
- Tanya Wright
- Department of Clinical Studies, University of Guelph, Guelph, N1G 2W1, Ontario, Canada
| | - Brigitte A Brisson
- Department of Clinical Studies, University of Guelph, Guelph, N1G 2W1, Ontario, Canada
| | - Geoffrey A Wood
- Department of Pathobiology, University of Guelph, Guelph, N1G 2W1, Ontario, Canada
| | - Michelle Oblak
- Department of Clinical Studies, University of Guelph, Guelph, N1G 2W1, Ontario, Canada
| | - Anthony J Mutsaers
- Department of Clinical Studies, University of Guelph, Guelph, N1G 2W1, Ontario, Canada
- Department of Biomedical Sciences, University of Guelph, Guelph, N1G 2W1, Ontario, Canada
| | - Victoria Sabine
- Department of Clinical Studies, University of Guelph, Guelph, N1G 2W1, Ontario, Canada
- Department of Animal Cancer Centre, University of Guelph, Guelph, N1G 2W1, Ontario, Canada
| | - Karolina Skowronski
- Department of Clinical Studies, University of Guelph, Guelph, N1G 2W1, Ontario, Canada
- Department of Animal Cancer Centre, University of Guelph, Guelph, N1G 2W1, Ontario, Canada
| | - Catherine Belanger
- Department of Clinical Studies, University of Guelph, Guelph, N1G 2W1, Ontario, Canada
| | - Angela Tiessen
- Department of Pathobiology, University of Guelph, Guelph, N1G 2W1, Ontario, Canada
| | - Dorothee Bienzle
- Department of Pathobiology, University of Guelph, Guelph, N1G 2W1, Ontario, Canada
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Griffin LR, Thamm DH, Brody A, Selmic LE. Prognostic value of fluorine 18 flourodeoxyglucose positron emission tomography/computed tomography in dogs with appendicular osteosarcoma. J Vet Intern Med 2019; 33:820-826. [PMID: 30768736 PMCID: PMC6430893 DOI: 10.1111/jvim.15453] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 01/30/2019] [Indexed: 12/22/2022] Open
Abstract
Background Factors indicative of a negative prognosis for appendicular osteosarcoma (OSA) in dogs are visible metastatic disease, location, and size of lesion. In human medicine maximum standard uptake value (SUVmax), as measured on a fluorine18 flourodeoxyglucose positron emission tomography/computed tomography (18F‐FDG PET/CT), is prognostic for survival for several tumor types. Objective Determine if SUVmax is associated with progression‐free interval (PFI) and determination of survival in dogs with appendicular OSA. Animals Sixty‐two dogs with untreated appendicular OSA that had been staged with 18F‐FDG PET/CT. Methods Retrospective analysis of the 18F‐FDG PET/CT was performed. Dogs were excluded from the study if they did not receive definitive intent treatment for their primary OSA and adjuvant chemotherapy with carboplatin, or had visible metastatic disease on initial imaging. A region of interest (ROI) was created around the primary tumor to measure SUVmax. Univariable and multivariable Cox proportional hazards analysis was performed to evaluate for associations between variables including SUVmax and outcome of PFI and overall survival (OS). Results Maximum standard uptake value of the primary tumor was significantly associated with the OS (P = .04) with adjustment for treatment type and monocyte count. The overall median survival time (OST) was 284 days (range, 39‐1293 days) with the OST of dogs having an SUVmax of ≥7.4 of 254 days (range, 98‐428 days) and dogs with an SUVmax of <7.4 of 680 days (range, 108‐811 days, P = .01). Conclusions and Clinical Importance Maximum standard uptake value as measured via 18F‐FDG PET/CT is significantly associated with survival in dogs with appendicular OSA with a high SUVmax being an indicator of a negative prognosis.
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Affiliation(s)
- Lynn R Griffin
- Department of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins, Colorado
| | - Douglas H Thamm
- Department of Clinical Sciences and Flint Animal Cancer Center, Colorado State University, Fort Collins, Colorado
| | - Ariel Brody
- North Carolina State University Veterinary Hospital, Raleigh, North Carolina
| | - Laura E Selmic
- Ohio State University Veterinary Medical Center, Columbus, Ohio
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20
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Vimentin, osteocalcin and osteonectin expression in canine primary bone tumors: diagnostic and prognostic implications. Mol Biol Rep 2018; 45:1289-1296. [PMID: 30066297 DOI: 10.1007/s11033-018-4285-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 07/26/2018] [Indexed: 12/14/2022]
Abstract
Canine primary bone tumors have a plastic radiographic image, demanding histopathological confirmation. Bone tumors are characterized by the type and amount of extracellular matrix produced what cannot be easily recognized, especially in biopsy samples. Identifying cellular markers that could aid diagnosis has supported various studies in oncological pathology. This study aimed to evaluate 22 canine primary bone neoplasms, establishing their histopathological diagnosis and evaluated vimentin, osteonectin and osteocalcin expression and their implication in diagnosis and prognosis. There were 12 productive osteoblastic osteosarcomas, six minimally productive osteoblastic osteosarcoma, two chondrosarcomas, one fibrosarcoma and one hemangiosarcoma. Immunostaining was cytoplasmatic in all cases, with average percentage of 87.9% for vimentin, 98.0% for osteonectin and 99.9% for osteocalcin. In this last case, only osteosarcomas were considered. Intensity was higher in vimentin labeling (+++), followed by osteonectin (++) and osteocalcin (+). One osteosarcoma showed negative immunostaining for vimentin and of samples submitted to anti-osteocalcin immunostaining, three osteosarcomas and one fibrosarcoma had negative staining. Besides identifying mesenchymal origin, vimentin elevated expression in canine bone tumors can be related to epithelial-mesenchymal transition, leading to more aggressive tumoral phenotypes and metastasis development. Similarly, high osteonectin expression is implicated in neoplastic cell invasion and is also related to metastasis spread. Decreased osteocalcin expression was found in some osteosarcoma samples and can be related to poor prognosis, as in human osteosarcomas. Our findings suggest that vimentin, osteonectin and osteocalcin not only aid diagnosis but can be related to prognosis in canine primary bone tumors, especially osteosarcomas and its osteoblastic subtype.
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21
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Roode SC, Shive HR, Hoorntje W, Bernard J, Stowe DM, Pool RR, Grindem CB. Multiloculated solitary (unicameral) bone cyst in a young dog. Vet Clin Pathol 2018; 47:484-488. [PMID: 29782037 DOI: 10.1111/vcp.12618] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
A 20-month-old female spayed Staffordshire Terrier (22.3 kg) presented to the Orthopedic Surgery Service at North Carolina State University Veterinary Teaching Hospital for evaluation of a 6-week history of toe-touching to nonweight-bearing lameness in the right hind limb. Radiographs of the right stifle revealed a multiloculated lytic lesion of the distal femur, with a large open lytic zone centrally, numerous osseous septations peripherally, and focal areas of cortical thinning and loss. An aspirate of the right distal femoral lesion yielded mildly cloudy serosanguineous fluid. Cytologic examination of the fluid revealed a pleomorphic population of discrete cells that exhibited marked anisocytosis and anisokaryosis and a variable nuclear-to-cytoplasmic (N:C) ratio, which were interpreted as probable neoplastic cells, with few macrophages, and evidence of hemorrhage. Given the clinical signs of pain, lesion size, and concern for malignant neoplasia, amputation of the right hind limb was performed. Histologically, the lesion had undulating walls 1-3 mm thick with a continuous outer layer of dense fibrous tissue and an inner layer composed of reactive cancellous bone with no cortical compacta remaining. Remnants of thin fibrous or fibro-osseous septa projected from the bony wall into the cyst lumen. The final histologic diagnosis was a benign multiloculated solitary (unicameral) bone cyst of the distal right femur. Based on the histopathologic findings, it was speculated that the cells identified on cytology were a mixture of developing osteoclasts, osteoblasts, endothelial, and stromal cells. This is the first report describing the cytologic examination of a solitary bone cyst in veterinary medicine.
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Affiliation(s)
- Sarah C Roode
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
| | - Heather R Shive
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
| | - Willemijn Hoorntje
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
| | | | - Devorah M Stowe
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
| | - Roy R Pool
- Department of Veterinary Pathobiology, College of Veterinary Medicine and Biomedical Sciences, Texas A & M University, College Station, TX, USA
| | - Carol B Grindem
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
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