Pseudomalignant myositis ossificans. Clinical, radiologic, and cytologic diagnosis in 5 cases.

In five cases of pseudomalignant myositis ossificans a benign diagnosis was suggested by fine-needle aspiration cytology and confirmed by radiographs and the clinical course. Hence, the need of biopsy to exclude malignancy was obviated. The symptoms rapidly resolved in all the patients. Thus, surgery may not be indicated in pseudomalignant myositis ossificans.