Adjuvant chemotherapy and/or radiotherapy in malignant SFT remains controversial. History
SFT was first mentioned in the scientific literature by Wagner. The first discussion of its clinical and pathological properties was by Klemperer and Rabin. SFTs have also been known as hemangiopericytomas although this term has now been discontinued from WHO tumor classifications.Over the years pleural SFTs acquired a number of synonyms, including localized fibrous tumor, benign mesothelioma, localized
fibrous mesothelioma, submesothelial fibroma, and pleural fibroma. The use of names that include ‘mesothelioma’ for this tumor is discouraged because of potential confusion with diffuse malignant mesothelioma, a much more serious disease. See also
Hemangiopericytoma
Myopericytoma

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External links

[1] World Health Organization Classification of Tumours. Pathology and Genetics of Tumours of the Lung, Pleura, Thymus and Heart. (Download Page)
In physics and chemistry, effusion is the process in which a gas escapes from a container through a hole of diameter considerably smaller than the mean free path of the molecules. Such a hole is often described as a pinhole and the escape of the gas is due to the pressure difference between the container and the exterior. Under these conditions, essentially all molecules which arrive at the hole continue and pass through the hole, since collisions between molecules in the region of the hole are negligible. Conversely, when the diameter is larger than the mean free path of the gas, flow obeys the Sampson flow law. In medical terminology, an effusion refers to accumulation of fluid in an anatomic space, usually without loculation. Specific examples include subdural, mastoid, pericardial and pleural effusions. Etymology
The word effusion derives from the Latin word, effundo, which means "shed, pour forth, pour out, utter, lavish, waste." Effusion into vacuum
Effusion from an equilibrated container into outside vacuum can be calculated based on kinetic theory.