FRACS Orthopaedic Exams


A thirty-eight-year-old man presented with two intermittently painful masses about the proximal portion of the right forearm. These masses had been growing in size throughout the previous year. The first mass was located over the olecranon and was minimally symptomatic. The newer mass was separate and appeared on the proximal extensor side of the ulna, causing mild to moderate intermittent pain. The patient had no precipitating or alleviating factors in association with this pain. There was no history of antecedent trauma, and the patient had no history of numbness and/or paresthesias, fevers, chills, night pain, night sweats, or weight loss during the course of the previous year.
On physical examination, there waws full range of motion, full strength, and normal neurovascular findings of the upper extremities bilaterally. Both lesions were fixed and mildly tender on palpation.
Imaging and an ultrasound-guided biopsy of the mass was performed, and the histopathologic results are presented below:

1. What is the diagnosis?
2. What are the principles of treatment of this condition?


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