Osteossarcoma axial intratorácico
Gomide, Paula Regina SilvaBrandão, Cláudia Valéria SeullnerBabicsak, Vivian RoccoMinto, Bruno Watanabe
Background: Bone tumors have a challenging diagnosis and treatment. Osteosarcoma is the name given to a heterogeneous group of malignant, agressive and invasive tumors that often determine bone lysis. Almost all of the animals develop lung metastases, progressing to death. Usually affect the appendicular skeleton, but can also occurs in others areas, although these presentations are rare. Prognosis is always poor. The aim of this paper is to report a case of a dog with osteoblastic osteosarcoma of the sternum, which was diagnosed by computed tomography and histopathologic analysis after excisional biopsy.Case: A male Cocker Spaniel dog, weighing 25 kg, elderly, was examined at the Veterinary Hospital. As main complaint was reported soft swelling on the ventral cervical region causing dyspnea. The patient had previously been medicated with dexamethasone with a significant decrease in the swelling, however recurrence was observed with the cessation of the treatment. Due to the presence of heart murmur, patient underwent to chest radiography and eletrocardiography. Images showed a tumor in the sternal lymph node region, displacing the heart caudally, trachea and esophagus dorsally, causing cranial edema due to a compression of the venous return by the cranial vena cava and subsequent dyspnea. Furosemide (Lasix®) was administered during ambulatorial treatment and prescribed to home, with satisfactory results, with decreased edema and consequent improvement of respiratory symptoms. It was decided to perform computed tomography to better design of the chest structure. The structure located in cranial thoracic region measured about 10.5 cm long x 5.8 cm high x 8.4 cm wide. The patient was undergone to sternotomy to remove the mass that was closely adhered to the sternum and pericardium. The pericardectomy and sternum removal were not performed due to animal being old and present metabolic and cardiopulmonary conditions.[...](AU)
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