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Challenges And Pitfalls In Diagnosis Of Parosteal Osteosarcoma: A Clinicopathologic Study Of 23 Cases, Muhammad Usman Tariq, Nasir Uddin, Arsalan Ahmed, Shahid Pervez, Romana Idress, Saira Fatima, Masood Umer, Naila Kayani Naila Kayani

Department of Radiology

Objective: Parosteal Osteosarcoma (PO) is an uncommon variant of osteosarcoma. Diagnosing PO is important due to its malignant nature but the diversity of histologic features makes it challenging by adding a number of soft tissue, bony and cartilaginous lesions into the list of differential diagnosis. Our aim was to study the clinicopathologic and histological features of PO with emphasis on features helpful in its discrimination from other mimicking lesions. Methods: We reviewed 23 cases of PO diagnosed in our institution between January 2001 and August 2015. Results: Femur was the most commonly involved bone (68.2%) along with other long bones …