Presentation Photo courtesy Dr. Kendra Freeman A seven-year-old male, intact Belgian malinois, presents with diarrhea and abdominal discomfort. Radiographs identify this abdominal mass, but ultrasound cannot clearly identify the organ of origin of the mass. 1) Extraskeletal osteosarcoma has been reported in which of the following organs? a) Gastrointestinal tract b) Spleen c) Subcutaneous tissue d) Eye e) All of the above 2) Extraskeletal osteosarcoma has a causal association with which of the following? a) Retained gauze swabs b) Spirocerca lupi c) Aflotoxicosis d) All of the above e) None of the above 3) What is the median survival time for extraskeletal osteosarcoma? a) 50-60 days b) 70-80 days c) 180-190 days d) >365 days
