A 45-year-old man presented with six month history of increasing cough and vague discomfort in the chest. A CT scan revealed a large anterior mediastinal mass compressing the heart. The mass was resected. The resected specimen consisted of an unencapsulated, well-circumscribed mass covered by smooth fibromembranous tissue and measuring 12.0 x 10.0 x 8.0 cm. On sectioning, the cut surfaces were yellow tan and lobulated.
The master list with the correct answer
• Desmoid tumor
• Low grade fibromyxoid sarcoma with giant collagen rosettes
• Malignant peripheral nerve sheath tumor
• Myxoid liposarcoma
• Solitary fibrous tumor
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• Appropriate diagnosis
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