“…Various needles have been used for this operation. Harvey and Harvey (1958), using a Franseen needle, obtained positive histological proof of carcinoma or tuberculosis in 14 (35%) out of 41 pleural biopsies, while Pagel and Goldfarb (1960), using a Harefield needle, obtained positive proof of tuberculosis in 13 (50%) out of 26 cases. Better results were reported by Welsh (1958), who obtained histological proof of carcinoma in 14 (82%) out of 17 cases using a Vim-Silverman needle, while Weiss (1961) obtained positive biopsies in 16 (66%) of his series of 24 cases with the same type of needle.…”