Growth Rate of Pulmonary Metastases from Soft Tissue Sarcoma

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Abstract
The growth rate of pulmonary metastases was analyzed in eleven patients with soft tissue sarcoma. In cases where more than two examinations were available the growth rate seemed to be exponential. In all but one case microscopic pulmonary spread was calculated to be present when the primary tumor was diagnosed. Tumor doubling time varied between 8 and 198 days in different patients. The variation in growth rate between various nodules in the same patient was much less pronounced but nevertheless considerable, which might, at least partly, be explained by tumor cell polyclonality. Computed tomography of the chest may detect pulmonary metastases earlier than conventional radiography and is therefore recommended in the preoperative work-up in soft tissue sarcoma.

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