Extraskeletal osteosarcoma in the duodenum of a cat

Abstract

A three-year-old, male neutered domestic longhair cat was referred for evaluation of icterus, vomiting, and anorexia. Abdominal ultrasonography revealed a proximal duodenal mass obstructing the common bile duct. The mass was surgically resected, and a cholecystoduodenostomy was performed. The histopathological diagnosis was osteosarcoma. Thoracic radiographs showed no evidence of metastasis, and bone scintigraphy revealed no signs of a primary skeletal osteosarcoma. Four months after surgery, the cat had intermittent vomiting, marked weight loss, and died.

Survey of the use of radiographs in the routine care in a veterinary clinic in the city of Manaus-AM

“…184, Art. 1244, 2011 cerca de 80% a 95% das neoplasias ósseas diagnosticadas em cães (JONGEWARD, 1985;BERG et al, 1990;STIMSON et al, 2000). Tanto cães machos quanto fêmeas podem ser acometidos por osteossarcomas (SPODNICK et al, 1992;SILVEIRA, 1996).…”

Liver and biliary tract

“…Not surprisingly, neoplasia of the gallbladder, CBD, or duodenal papilla holds a poor prognosis for most feline patients, 91,92 whereas pancreatitis or other inflammatory causes may respond to medical and surgical treatment much more readily. 10,98 Two large retrospective case series have been published reporting on prognostic factors and outcome in biliary diversion surgeries in cats.…”

“…8,85,[89][90][91][92][93][94] Cholestasis leads to hepatic parenchymal injury, such as cell membrane and organelle damage within a few weeks. Over time, biliary stasis leads to inflammation, free radical formation, biliary epithelial hyperplasia, and eventually …”

Cancer of the Gastrointestinal Tract

“…These procedures are indicated for all aggressive and/or invasive oral tumors, particularly lesions with extensive bone invasion, with poor sensitivity to RT, or that are too large for cryosurgery (Tables 22-3 and 22-4). [11][12][13][14][15][16][17][18][19][20][21][70][71][72][73] Margins of at least 2 cm are necessary for malignant cancers such as SCC, malignant melanoma, and fibrosarcoma in the dog. If possible, SCC in the cat should be treated with surgical margins greater than 2 cm because of high local recurrence rates.…”

“…77 Larger resections, including hemimandibulectomy, hemimaxillectomy, orbitectomy, and radical maxillectomy, are necessary for more aggressive tumors, especially fibrosarcoma, and malignant tumors with a more caudal location. [11][12][13][14][15][16][17][18][19][20][21][70][71][72] Although these large resections carry some morbidity, owner satisfaction with the cosmetic and functional outcomes is in excess of 85%. [11][12][13][14][15][16][17][18][19][20][21]71,73,78 Cosmesis is usually very good following most mandibulectomy and maxillectomy procedures ( Figure 22-7) but can be challenging with aggressive bilateral rostral mandibulectomies and radical maxillectomies.…”