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Our retrospective study evaluated the survival of 24 dogs with unresectable malignant melanoma treated with radiation therapy. Fifteen dogs were treated with radiation therapy (RT) and chemotherapy (CT), five with surgery followed by RT and CT, three with palliative RT, and one with electrochemotherapy associated with RT. All dogs were treated with an orthovoltage Stabilipan I. The protocol used was three or four weekly fractions of 8 Gy. Carboplatin was administered every 21 days, a total of four times. Five percent of dogs were classified as having stage I melanoma, 17% as stage II, 50% as stage III, and 17% as stage IV. Sixty-four percent had a partial response to treatment, 29% achieved complete remission, and 7% remained in a stable disease state. The mean survival time was 390 days for stage I, 286 days for stage II, 159 days for stage III, and 90 days for stage IV. We concluded that radiation therapy can be considered a viable alternative for the palliative treatment of canine oral melanoma.(AU)

O estudo retrospectivo analisou a sobrevida de 24 cães com melanomas irressecáveis tratados com radioterapia (RT). Quinze animais foram tratados com RT e quimioterapia (QT), 5 animais com cirurgia citoredutiva seguida por RT e QT, 3 animais com RT paliativa apenas e 1 animal com RT associada a 1 sessão de eletroquimioterapia. Os animais foram tratados com um equipamento de ortovoltagem Stabilipan I, e o protocolo foi de três a quatro frações semanais de 8 Gy. A quimioterapia consistiu de carboplatina administrada a cada 21 dias em um total de 4 aplicações. Apenas um animal (4%) foi classificado em estadio I, enquanto quatro (17%) estavam no estadio II, doze (50%) estavam no estadio III e quatro (29%) estavam no estadio IV. De maneira geral, 64% dos cães apresentaram resposta parcial, 29% remissão completa e 7% doença estável. O tempo médio de sobrevida foi de 390 dias no estádio I, 286 dias no estádio II, 159 dias no estádio III e 90 dias no estádio IV. A radioterapia deve ser considerada pelo clínico veterinário como alternativa para o tratamento de melanoma oral canino.(AU)

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ABSTRACT: Our retrospective study evaluated the survival of 24 dogs with unresectable malignant melanoma treated with radiation therapy. Fifteen dogs were treated with radiation therapy (RT) and chemotherapy (CT), five with surgery followed by RT and CT, three with palliative RT, and one with electrochemotherapy associated with RT. All dogs were treated with an orthovoltage Stabilipan I. The protocol used was three or four weekly fractions of 8 Gy. Carboplatin was administered every 21 days, a total of four times. Five percent of dogs were classified as having stage I melanoma, 17% as stage II, 50% as stage III, and 17% as stage IV. Sixty-four percent had a partial response to treatment, 29% achieved complete remission, and 7% remained in a stable disease state. The mean survival time was 390 days for stage I, 286 days for stage II, 159 days for stage III, and 90 days for stage IV. We concluded that radiation therapy can be considered a viable alternative for the palliative treatment of canine oral melanoma.

RESUMO: O estudo retrospectivo analisou a sobrevida de 24 cães com melanomas irressecáveis tratados com radioterapia (RT). Quinze animais foram tratados com RT e quimioterapia (QT), 5 animais com cirurgia citoredutiva seguida por RT e QT, 3 animais com RT paliativa apenas e 1 animal com RT associada a 1 sessão de eletroquimioterapia. Os animais foram tratados com um equipamento de ortovoltagem Stabilipan I, e o protocolo foi de três a quatro frações semanais de 8 Gy. A quimioterapia consistiu de carboplatina administrada a cada 21 dias em um total de 4 aplicações. Apenas um animal (4%) foi classificado em estadio I, enquanto quatro (17%) estavam no estadio II, doze (50%) estavam no estadio III e quatro (29%) estavam no estadio IV. De maneira geral, 64% dos cães apresentaram resposta parcial, 29% remissão completa e 7% doença estável. O tempo médio de sobrevida foi de 390 dias no estádio I, 286 dias no estádio II, 159 dias no estádio III e 90 dias no estádio IV. A radioterapia deve ser considerada pelo clínico veterinário como alternativa para o tratamento de melanoma oral canino.

RESUMO

Our retrospective study evaluated the survival of 24 dogs with unresectable malignant melanoma treated with radiation therapy. Fifteen dogs were treated with radiation therapy (RT) and chemotherapy (CT), five with surgery followed by RT and CT, three with palliative RT, and one with electrochemotherapy associated with RT. All dogs were treated with an orthovoltage Stabilipan I. The protocol used was three or four weekly fractions of 8 Gy. Carboplatin was administered every 21 days, a total of four times. Five percent of dogs were classified as having stage I melanoma, 17% as stage II, 50% as stage III, and 17% as stage IV. Sixty-four percent had a partial response to treatment, 29% achieved complete remission, and 7% remained in a stable disease state. The mean survival time was 390 days for stage I, 286 days for stage II, 159 days for stage III, and 90 days for stage IV. We concluded that radiation therapy can be considered a viable alternative for the palliative treatment of canine oral melanoma.

O estudo retrospectivo analisou a sobrevida de 24 cães com melanomas irressecáveis tratados com radioterapia (RT). Quinze animais foram tratados com RT e quimioterapia (QT), 5 animais com cirurgia citoredutiva seguida por RT e QT, 3 animais com RT paliativa apenas e 1 animal com RT associada a 1 sessão de eletroquimioterapia. Os animais foram tratados com um equipamento de ortovoltagem Stabilipan I, e o protocolo foi de três a quatro frações semanais de 8 Gy. A quimioterapia consistiu de carboplatina administrada a cada 21 dias em um total de 4 aplicações. Apenas um animal (4%) foi classificado em estadio I, enquanto quatro (17%) estavam no estadio II, doze (50%) estavam no estadio III e quatro (29%) estavam no estadio IV. De maneira geral, 64% dos cães apresentaram resposta parcial, 29% remissão completa e 7% doença estável. O tempo médio de sobrevida foi de 390 dias no estádio I, 286 dias no estádio II, 159 dias no estádio III e 90 dias no estádio IV. A radioterapia deve ser considerada pelo clínico veterinário como alternativa para o tratamento de melanoma oral canino.

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Background: Sutures plays an important role in wound repair by providing hemostasis and support for healing suture. Synthetic non-absorbable like polypropylene suture materials induce minimal tissue reaction. Polypropylene has not been associated to neoplasms in domestic animals. The aim this study is to describe the first case of polypropylene suture induced hemangiosarcoma in an abdominal wall of a feline.Case: A 13-year-old female domestic shorthair cat was presented with a ventral abdominal subcutaneous mass. Clinical examination revealed a firm, rough, and irregular, approximately 6 x 4 cm subcutaneous mass involving the caudal ventral abdomen. A complete blood (cell) count (CBC) was within normal limits. Leukemia and FIV tests were negative; and the results of a chemistry panel revealed elevated creatinine (valor: 2.0 reference range: 0.5-1.9). Abdominal ultrasound revealed a large mass of mixed echogenicity in the mid-ventral abdomen cranial to the bladder, measuring approximately 6 x 4 cm in the middle line with suture deeply embedded within mass suggesting foreign body reaction or neoplasm. There was evidence of sutures (hyperechoic lines) along the caudal abdominal wall extending into the mass. Records indicated that ovariohysterectomy procedure was performed 12 years previously at the same clinic and the closure of the abdominal wall was made with polypropylene sutures. No other abdominal surgery was performed in this cat. A fine-needle aspirate of the mass and contrast-enhanced computed tomography was not performed due to owners finance restrains. The cat was referred to surgery and the mass was excised. No evidence of metastasis was noted during surgery. Histologically, the neoplastic cells were oval to round with granular cytoplasm and vesicular nucleus and exhibited moderate cellular and nuclear pleomorphism. A diagnosis of abdominal wall hemangiosarcoma was made with suture deeply embedded within mass. Surgical margins were clear. [...](AU)

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Background: Clients who seek veterinary care for pets with cancer are often concerned about the potential negative impact of chemotherapeutic treatments on their animals quality of life. A consensus currently exists in veterinary oncology regarding the quantification and rating of adverse treatment effects in dogs and cats in response to chemotherapy agents. This grading system is referred to as Veterinary Cooperative Oncology Group - Common Terminology Criteria for Adverse Events. The purpose of this retrospective case series was to investigate the delayed acute effects of chemotherapy drugs in cats receiving cancer treatment.Materials, Methods & Results: Medical records were reviewed to determine the chemotherapy agent used and delayed adverse effects. Side effects were classified according to Veterinary Co-operative Oncology Group grading. All cats were evaluated after the first chemotherapy administration, after a single dose. The reported effects included hematologic effects (e.g., neutropenia, thrombocytopenia, increases in liver enzymes, and azotemia), gastrointestinal effects (e.g., vomiting, diarrhea, and inappetence), and sepsis. All of the cats in this study received ondansetron and omeprazol in the first five days following chemotherapy administration. If vomiting occurred with oral medication, maropitant was administered subcutaneously for three consecutive days. If diarrhea (> grade II) occurred, probiotics were administered for seven days. Hematologic examination was performed 3-14 days after chemotherapy. If neutropenia (> grade III) occurred, Human granulocyte colony stimulating factor was administered subcutaneously for three consecutive days together with prophylactic antibiotics. Lomustine, carboplatin, vincristine, doxorubicin, cyclophosphamide, mitoxantrone, and vinblastine were administered in 33%, 19%, 16%, 5%, 16%, 10% and 2% of the cases examined, respectively.[...](AU)

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Background: Clients who seek veterinary care for pets with cancer are often concerned about the potential negative impact of chemotherapeutic treatments on their animals’ quality of life. A consensus currently exists in veterinary oncology regarding the quantification and rating of adverse treatment effects in dogs and cats in response to chemotherapy agents. This grading system is referred to as Veterinary Cooperative Oncology Group - Common Terminology Criteria for Adverse Events. The purpose of this retrospective case series was to investigate the delayed acute effects of chemotherapy drugs in cats receiving cancer treatment.Materials, Methods & Results: Medical records were reviewed to determine the chemotherapy agent used and delayed adverse effects. Side effects were classified according to Veterinary Co-operative Oncology Group grading. All cats were evaluated after the first chemotherapy administration, after a single dose. The reported effects included hematologic effects (e.g., neutropenia, thrombocytopenia, increases in liver enzymes, and azotemia), gastrointestinal effects (e.g., vomiting, diarrhea, and inappetence), and sepsis. All of the cats in this study received ondansetron and omeprazol in the first five days following chemotherapy administration. If vomiting occurred with oral medication, maropitant was administered subcutaneously for three consecutive days. If diarrhea (> grade II) occurred, probiotics were administered for seven days. Hematologic examination was performed 3-14 days after chemotherapy. If neutropenia (> grade III) occurred, Human granulocyte colony stimulating factor was administered subcutaneously for three consecutive days together with prophylactic antibiotics. Lomustine, carboplatin, vincristine, doxorubicin, cyclophosphamide, mitoxantrone, and vinblastine were administered in 33%, 19%, 16%, 5%, 16%, 10% and 2% of the cases examined, respectively.[...]

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Background: Sutures plays an important role in wound repair by providing hemostasis and support for healing suture. Synthetic non-absorbable like polypropylene suture materials induce minimal tissue reaction. Polypropylene has not been associated to neoplasms in domestic animals. The aim this study is to describe the first case of polypropylene suture induced hemangiosarcoma in an abdominal wall of a feline.Case: A 13-year-old female domestic shorthair cat was presented with a ventral abdominal subcutaneous mass. Clinical examination revealed a firm, rough, and irregular, approximately 6 x 4 cm subcutaneous mass involving the caudal ventral abdomen. A complete blood (cell) count (CBC) was within normal limits. Leukemia and FIV tests were negative; and the results of a chemistry panel revealed elevated creatinine (valor: 2.0 reference range: 0.5-1.9). Abdominal ultrasound revealed a large mass of mixed echogenicity in the mid-ventral abdomen cranial to the bladder, measuring approximately 6 x 4 cm in the middle line with suture deeply embedded within mass suggesting foreign body reaction or neoplasm. There was evidence of sutures (hyperechoic lines) along the caudal abdominal wall extending into the mass. Records indicated that ovariohysterectomy procedure was performed 12 years previously at the same clinic and the closure of the abdominal wall was made with polypropylene sutures. No other abdominal surgery was performed in this cat. A fine-needle aspirate of the mass and contrast-enhanced computed tomography was not performed due to owner’s finance restrains. The cat was referred to surgery and the mass was excised. No evidence of metastasis was noted during surgery. Histologically, the neoplastic cells were oval to round with granular cytoplasm and vesicular nucleus and exhibited moderate cellular and nuclear pleomorphism. A diagnosis of abdominal wall hemangiosarcoma was made with suture deeply embedded within mass. Surgical margins were clear. [...]

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The aim of this study was to measure ionized calcium and intact parathormone concentrations after unilateral thyroidectomy with parathyroid autotransplantation in hyperthyroid cats. Hiperthyroid cats may have calcium homeostasis disorder and have decreased calcium concentration. Calcium levels decrease after thyroidectomy and their levels must be measured before thyroidectomy. Seventeen hyperthyroid cats with palpable nodules were submitted to clinical and laboratorial examination and they were prepared to surgery. Unilateral thyroidectomy with parathyroid gland autotransplantation was performed. Concentrations of serum urea, creatinine, alkaline phosphatase, alanine aminotransferase, phosphorus, potassium, total thyroxine and hematologic profile were determined before and seven days after surgery. Blood samples for serum ionized calcium concentration were collected before and after surgery on days 1, 2, 7, 15, 21. Serum calcium concentration fell significantly in all cats within 24 hours after surgery. Hypocalcemia occurred in two cats without clinical signs. The iPTH concentration measurements for samples throughout the study were uniformly low, with no patterns or trends identified. There wasnt correlation between serum calcium levels and iPTH levels in any moment before and after surgery. iPTH couldnt indicate parathyroid gland function after thyroidectomy in cats. The resultsof this study suggest that calcium concentration of all thyroidectomized cats must be measured before surgery even if they are submitted to unilateral thyroidectomy. iPTH concentration doenst evaluate patathyroid gland function.(AU)

O objetivo deste estudo é avaliar as concentrações de cálcio ionizado e paratormônio intacto (iPTH) após a tireoidectomia com implantação da paratireoide em gatos hipertireoideos. Gatos hipertireoideos podem apresentar hipocalcemia por apresentarem distúrbio na homeostase de cálcio. A tireoidectomia pode levar a hipocalcemia pós-operatória, sendo, portanto, fundamental a mensuração dos níveis de cálcio antes da cirurgia em pacientes hipertireoideos. Dezessete gatos com hipertireoidismo com lobos cervicais palpáveis foram examinados e avaliados laboratorialmente para a cirurgia. Tireoidectomia unilateral com implantação da glândula paratireoide foi realizada. Hemograma completo, ureia, creatinina, fosfatase alcalina, alanino aminotransferase, fósforo, potássio e tiroxina total foram realizados antes e sete dias após a cirurgia. Amostras de sangue para avaliar cálcio ionizado e paratormônio intacto foram coletadas antes e nos dias 1, 2, 7, 15 e 21 após a cirurgia. Os níveis séricos de cálcio diminuíram significativamente em 24 horas após a cirurgia. Hipocalcemia subclínica ocorreu em dois gatos. As concentrações de iPTH foram uniformemente baixas ao longo do estudo e não avaliaram a função da glândula paratireoide após a tireoidectomia nesses gatos. Não houve correlação entre os níveis de cálcio e de iPTH. Os resultados deste estudo sugerem que os níveis de iPTH não indicam função da glândula paratireoide e que os níveis de cálcio devem ser avaliados antes da tireoidectomia, mesmo nos casos de tireoidectomia unilateral.(AU)

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O objetivo deste estudo é avaliar as concentrações de cálcio ionizado e paratormônio intacto (iPTH) após a tireoidectomia com implantação da paratireoide em gatos hipertireoideos. Gatos hipertireoideos podem apresentar hipocalcemia por apresentarem distúrbio na homeostase de cálcio. A tireoidectomia pode levar a hipocalcemia pós-operatória, sendo, portanto, fundamental a mensuração dos níveis de cálcio antes da cirurgia em pacientes hipertireoideos. Dezessete gatos com hipertireoidismo com lobos cervicais palpáveis foram examinados e avaliados laboratorialmente para a cirurgia. Tireoidectomia unilateral com implantação da glândula paratireoide foi realizada. Hemograma completo, ureia, creatinina, fosfatase alcalina, alanino aminotransferase, fósforo, potássio e tiroxina total foram realizados antes e sete dias após a cirurgia. Amostras de sangue para avaliar cálcio ionizado e paratormônio intacto foram coletadas antes e nos dias 1, 2, 7, 15 e 21 após a cirurgia. Os níveis séricos de cálcio diminuíram significativamente em 24 horas após a cirurgia. Hipocalcemia subclínica ocorreu em dois gatos. As concentrações de iPTH foram uniformemente baixas ao longo do estudo e não avaliaram a função da glândula paratireoide após a tireoidectomia nesses gatos. Não houve correlação entre os níveis de cálcio e de iPTH. Os resultados deste estudo sugerem que os níveis de iPTH não indicam função da glândula paratireoide e que os níveis de cálcio devem ser avaliados antes da tireoidectomia, mesmo nos casos de tireoidectomia unilateral.

The aim of this study was to measure ionized calcium and intact parathormone concentrations after unilateral thyroidectomy with parathyroid autotransplantation in hyperthyroid cats. Hiperthyroid cats may have calcium homeostasis disorder and have decreased calcium concentration. Calcium levels decrease after thyroidectomy and their levels must be measured before thyroidectomy. Seventeen hyperthyroid cats with palpable nodules were submitted to clinical and laboratorial examination and they were prepared to surgery. Unilateral thyroidectomy with parathyroid gland autotransplantation was performed. Concentrations of serum urea, creatinine, alkaline phosphatase, alanine aminotransferase, phosphorus, potassium, total thyroxine and hematologic profile were determined before and seven days after surgery. Blood samples for serum ionized calcium concentration were collected before and after surgery on days 1, 2, 7, 15, 21. Serum calcium concentration fell significantly in all cats within 24 hours after surgery. Hypocalcemia occurred in two cats without clinical signs. The iPTH concentration measurements for samples throughout the study were uniformly low, with no patterns or trends identified. There wasn't correlation between serum calcium levels and iPTH levels in any moment before and after surgery. iPTH couldn't indicate parathyroid gland function after thyroidectomy in cats. The results of this study suggest that calcium concentration of all thyroidectomized cats must be measured before surgery even if they are submitted to unilateral thyroidectomy. iPTH concentration doens't evaluate patathyroid gland function

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Background: Feline nasal lymphoma is generally a localized and radiosensitive tumor. Treatment options include radiation therapy, chemotherapy, or a combination of both treatments. Chemotherapy alone is generally not effective, leading to median survival times of 98 to 358 days, while RT alone or a combination of RT and chemotherapy lead to median survivals of 19 months and 955 days, respectively. Orthovoltage radiation therapy, the only radiation available in Brasil, has the disadvantage of being superficial, treating only tumors of 2 cm or less and causing marked skin side effects. The objective of this paper is to report two cases of advanced feline nasal lymphoma, with cribriform plate destruction and central nervous system invasion, successfully treated with orthovoltage radiation therapy and systemic chemotherapy. Case: Two female mixed breed cats were presented with nasal discharge, sneezing and facial deformity. The second cat also had neurologic signalment. Definitive diagnosis in histopathology was lymphoma. Computed tomography revealed advanced disease in both cases, with intranasal mass, bone lysis, invasion of orbital space and central nervous system. Both cats were treated with radiation therapy combined with chemotherapy. The first case received radiation therapy for gross disease (12 daily fractions of 300 cGy, five times per week) and CCNU/prednisolone [...](AU)

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