Periodic and turbulent behavior of solitary structures in distributed active media.
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Biomedical subjects
Publications and source records attributed to H Willebrand.
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The dangers are emphasised of conservative surgery for soft-tissue malignancy of the hand, based on three cases. In the first, a fibrosarcoma which had developed in a longstanding fistula was treated by partial amputation, lymph node dissection and radiotherapy. Two recurrences arose locally at a later juncture. In the second case, a bone cyst diagnosed a "proliferative synovioma" was resected locally, only to recur on two further occasions being finally characterised as a spindle-cell sarcoma. In the third case, autopsy revealed metastatic Ewing's sarcoma in a patient initially treated by local resection of a "mesenchymal blastoma".
Severe damage to functionally important structures of the hand as a direct result of megavoltage radiation may be seen. The appropriate treatment of these uncommon acute and chronic radiation changes consists in principle or excision and skin flap covering. Such treatment will limit the functional disability of the hand. In addition, the severe late consequences of radiokeratosis and squamous cell carcinoma can be prevented.
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