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  • Title: Non-traumatic myositis ossificans mimicking a malignant neoplasm in an 83-year-old woman: a case report.
    Author: Nishio J, Nabeshima K, Iwasaki H, Naito M.
    Journal: J Med Case Rep; 2010 Aug 12; 4():270. PubMed ID: 20704714.
    Abstract:
    INTRODUCTION: Myositis ossificans is a benign, self-limiting condition that usually affects young, athletically active men. To the best of our knowledge, this case report describes the oldest recorded patient with myositis ossificans. CASE PRESENTATION: Our patient was an 83-year-old Japanese woman who presented with a one week history of a palpable mass in the left thigh. She had a history of surgery for transverse colon cancer and lung cancer at the ages of 73 and 80, respectively. Clinical and radiological examinations suggested a malignant neoplasm such as metastatic carcinoma or extraskeletal osteosarcoma. A diagnosis of myositis ossificans was made by core needle biopsy. Our patient was asymptomatic and had no recurrence at one year follow-up. CONCLUSION: Clinicians should consider myositis ossificans as a possible diagnosis for a soft tissue mass in the limb of an older patient, thereby avoiding unnecessarily aggressive therapy.
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