A 35 year old patient underwent radical abdominal hysterectomy for uterine malignancy, which was confined on curettage material. Histological examination revealed a wide range of atypical mesenchymal components. For further specification ultrastructural examination was performed. Intracytoplasmic microfilaments, sometimes arranged in bundles, were a feature common to all tumor cells despite their shape and arrangement. The tumor thus was classified as a polymorphcellular fibrosarcoma. The patient is now free from recurrences after a period of two years.
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